4/3(3x)^1/3*3=4(3x)^(1/3)
f'(8)=4*(3*8)^(1/3)=8*3(1/3)
либо f'=4/3(x^(1/3))*3=4x^(1/3)
f'(8)=4*8(1/3)=8
f=x^(-sqrt(3))
f'=-sqrt(3)x^(-sqrt(3)-1)
f'(1)=-sqrt(3)
4/3(3x)^1/3*3=4(3x)^(1/3)
f'(8)=4*(3*8)^(1/3)=8*3(1/3)
либо f'=4/3(x^(1/3))*3=4x^(1/3)
f'(8)=4*8(1/3)=8
f=x^(-sqrt(3))
f'=-sqrt(3)x^(-sqrt(3)-1)
f'(1)=-sqrt(3)