求下列函數(shù)的導(dǎo)數(shù):φ(x)=e-xy2dy.
求下列函數(shù)的導(dǎo)數(shù):φ(x)=arctandy.
設(shè)某產(chǎn)品生產(chǎn)q(kg)的總成本C為C(q)=1000+7q+50*q1/2,q∈[0,10000]