已知y=arcsinƒ(x2),求y´.
y=arcsinƒ(x2),函数可以看成由y=arcsinu,u=ƒ在此处键入公式。(υ),υ=x2复合而得到,所以 dy/dx=dy/du•du/dυ•dυ/dx=1/√(1-u2)•(dƒ/dυ)•2x ={2x/√1-[ƒ(x2)]2}ƒ’(x2)
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