Question

已知f﹙x﹚=x㏑x若则f’﹙x0﹚=2,则x0＝?

Answer 1

f﹙x﹚=x㏑x

f'(x)=lnx+x*(1/x)=lnx+1

f’﹙x0﹚=ln(x0)+1=2

ln(x0)=1

x0=e