Ye Zirong took the pen, spread out the hand-copied question on the table, sat down in the chair, and wrote intently on the hand-copied paper.

The end of the pen rustled across the paper, and in less than a minute, the first question was completed.

Answer: (I.) From f(x)=2x^4+3x^3-3x^3-6x+a, y(x)=f'(x)=8x^3+9x^2-6x-6.

y'(x)=24x^2+18x-6.y'(x)=0.

The solution yields X=-1, or x=1/4.

When x changes, y'(x), y(x) change as follows:

......

So, the monotonically increasing interval of y(x) is (-∞, -1), (1/4, +∞), and the monotonically decreasing interval is (-1, 1/4).

"Ah, Brother Zirong, you actually made it, this can't be true, right?" Qin Xiaobai grabbed the answer sheet and looked at it again, the expression full of suspicion on his face gradually turned into a kind of convincing.

"Brother Zirong, when did you become so powerful?" the little girl couldn't believe her eyes, she thought it was incredible.

"Xiaobai, you think about it carefully, you go back to the room to think about this second question slowly. ”

"If you can make it, of course I can do it, Brother Zirong, you wait, I'll show you the answer to the second question tomorrow morning!" Qin Xiaobai pouted and said.

All students with good academic performance have a ruthlessness that does not admit defeat, the more difficult the topic, the more courageous they are to climb, Qin Xiaobai is no exception, she is determined to make the second question, and prove her strength to Ye Zirong, who has a much worse grade than her.

After Qin Xiaobai left, Ye Zirong hurriedly locked the door and began to decoction the herbs.

While frying herbs, he did not delay for a moment, went to bed and sat cross-legged, pinched the recipe with both hands, turned his heart to the sky, read the heart clear, mobilized the Qiankun Yuan in his body, and cultivated the Xuanzhen Muhuang Duren True Recipe in the Xuanyi Heavenly Scripture.

For the Divine Acupuncture Hand, cultivating the Xuanyi Heavenly Scripture is much more important than the college entrance examination.

After more than thirty minutes of decoction, the room was filled with the fragrance of medicine, so he quickly jumped out of bed, poured the decoction into the vessel, waited for the temperature to drop, and drank it all in one go, and then sat down on the bed to meditate.

This time of refining, the stasis in the body has been much less than the previous two times, and the Qiankun Yuan in the body runs more unimpeded, and the pain during body refining is basically no longer felt.

Ye Zirong held his breath, stopped as soon as he had a thought, and let the inner yuan drive the medicinal power, and the reincarnation flowed, slowly cleaning the remaining stasis and poison accumulation in his body.

When the tempering was carried out for more than forty minutes, his whole body had reached a state of tranquility like an ancient well, and the degree of his body, mind and mind had made him reach the realm of selflessness.

Suddenly, his ears tightened, and he heard a subtle sound of running water coming from his body, and he immediately opened his eyes, probed with his divine sense, and found that the stasis and poisonous accumulation in his body had been completely cleaned up.

He hurriedly opened the door, rushed into the bathroom, and after a burst of excretion, he took a hot shower, and suddenly felt hearty and happy.

This time, the dirt in his body was completely gone, and the cultivation of this level of body quenching was all completed.

For ordinary monks, the time to quench the body is generally as little as three months and more than half a year, but Ye Zirong has a special physique, and there is a fighting spirit in his body, so he cultivates and enters the realm very quickly, and after only three times of quenching his physique, he has advanced, which is really rare in the cultivation realm.

In addition to being happy, he went to bed again, meditated cross-legged, and cultivated the Xuanzhen Wood Emperor in the Heavenly Scripture.

Halfway through his cultivation, he felt a faint liquid flowing in his body, the liquid was very soft and smooth, but there was a faint pain wherever he passed.

He pinched his fingers and knew that this was the gold liquid that had slowly grown in his body.

When the gold liquid was generated, he suddenly felt extremely hot in his body, and his whole body was uncomfortable, so he couldn't help but open the window and jump out directly.

Outside the window was a small hill in the distance, and the mountain breeze blew over his face, and he felt that his whole body was filled with explosive power, which made him want to stop, and even had the urge to fly.

This internal energy needs to be eliminated in time, otherwise it will cause harm to the body.

He immediately took out a square inch of soul cultivation wood from his pocket, turned into a giant tree with a drink, jumped up, clamped his legs, and the divine tree flew towards the top of the hill.

The mountain was very cool, Ye Zirong's legs were tightly clamped between Shenmu, his body danced in the air, his fists moved the void, and he tossed for a while before he felt that the flames in his body were gradually extinguished, and his body was not so uncomfortable.

The soul nourishing wood circled a few times above the hill, and was about to turn around and fly back, but was stopped by him.

"Shenmu, you fly further. Ye Zirong saw that the other side of the hill was actually a residential area.

It wasn't early, there were only a few sporadic lights in the residential area, and the soul nourishing wood flew forward for a while, and the lights were extinguished.

But a temple caught his eye, one temple on the edge of a residential area, but the inside was brightly lit.

"Why don't the people who chant Buddha and eat fast sleep so late?" Ye Zirong pointed to the temple with his hand, and the sacred tree flew over immediately.

After a while, the sacred tree flew to a plane tree, which happened to be in the courtyard wall of the temple.

The temple gate of the temple was empty, Ye Zirong found a big Buddha on the main hall through the crack in the door, and a few candles were burned in front of the Buddha, but there was no monk kneeling on the futon in front of the Buddha statue to worship and chant sutras.

He was originally born in Taoism, and he didn't have much to do with Buddhism, so it was inconvenient for him to meddle in things, but since he came, he wanted to see what was going on.

He moved his body forward to a tree pole near the Buddha Hall, but he heard a sound of giggling coming from the right wing of the Buddha Hall.

Buddhism is a pure place, how can anyone make a loud noise here?

At his signal, the Soul Nourishing Wood slowly flew out of the window of the wing.

stretched out his index finger and dipped it on his tongue, then buckled a small hole in the window paper, and put his eyes together to look at it, Ye Zirong was suddenly startled.

I saw four monks sitting on a wooden couch playing cards, and the table next to them was equipped with a lot of wine and meat.

A middle-aged monk reached out to the table and took a bottle of beer, with a thumb up, the bottle cap opened, poured a few sips into his ......mouth, and said to a little monk opposite: "Fourth brother, is the little girl still closed?"

The little monk took a bite of the chicken leg in his hand, took a card out of the wooden couch, and said, "Senior brother, where is it still closed? ”

The middle-aged monk nodded, with a weird smile on his face, and said, "This little girl has fine skin and tender meat, but she can't be kept underground for a long time, and when the time comes, it will change its taste, and it will not be fresh." ”

"Hehe, it's better to be a monk! Every time after the Spring Festival, many women come to the temple to worship the Buddha and ask for children, and many people are really pregnant after this event, and the old woman at home is so happy that she keeps sending money, but I don't know that it is all the seeds we planted. A monk on the left side of the middle-aged monk played a card and said with a smile.

Another monk immediately played a fried card and answered: "Second senior brother is not a picky eater anyway, and those who come will not refuse." I like this little girl, she's young and beautiful, and it's so comfortable to play, haha!"

The middle-aged monk said with a fluttering eyebrow: "It's rare to catch a tender little girl, but you can't let her run away." ”

The little monk finished gnawing the chicken legs and said, "They are all locked with steel chains, and they can't run away! Senior brother, it's my turn tonight, right?"