Question

求导数，，

Answer 1

y'＝π▪cos（πx＋ψ）这是一个复合函数，求导时先求外面的再求里面的。即｛f[ψ（x）]｝'＝f'[ψ（x）]▪ψ'（x）

Answer 2

more bottles at them; they stood, sat, ran, lay, and rolled, but each made noise of some sort, and most drank. Plainly donkey-riding had palled, for a man and a boy had gathered their half-dozen donkeys together, and

Answer 3

如图