求y=sin(3x+1)的導(dǎo)數(shù),要重要的過程,
求y=sin(3x+1)的導(dǎo)數(shù),要重要的過程,
其他人氣:992 ℃時間:2019-09-27 11:01:11
優(yōu)質(zhì)解答
f'(x)=lim(Δx-->0)Δy/Δx=lim(Δx-->0)[sin(3x 3Δx 1)-sin(3x 1)]/Δx=lim(Δx-->0)[2cos(3x 3/2*Δx 1)sin(3Δx/2)]/Δx=cos(3x 1)*lim(Δx-->0)3sin(3Δx/2)/(3Δx/2)根據(jù)重要極限lin(x-->0)sinx/x=1∴l(xiāng)im(Δx-...
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