求助f(x)=x3-3x k,g(x)=(2kx-k)/(x2 2)1/2×2/3×3/4×4/5×…×9M=,N=|ax b|0)
问题描述:
求助f(x)=x3-3x k,g(x)=(2kx-k)/(x2 2)1/2×2/3×3/4×4/5×…×9
M=,N=|ax b|0)
答
x^2-8x 9比方bcosA-2ccosB=2bcosC-acosB比方m[f(x)]2 nf(x) p=0a3 b3