f(X)等于e方x-2x+21n2,求极直
问题描述:
f(X)等于e方x-2x+21n2,求极直
答
f(x)=e^x-2x+2ln2
f'(x)=e^x-2=0
e^x=2
lne^x=ln2
xlne=ln2
x=ln2
当x=ln2时
f(ln2)=e^ln2-2ln2+2ln2=e^ln2=2
极值点是(ln2,2)