f(x)=(x-8)(2x^2+x+4)
f'(x)=(x-8)'(2x^2+x+4) + (x-8)(2x^2+x+4)' = (2x^2+x+4) + (x-8)(4x+1) = 2x^2+x+4 + 4x^2+x - 32x-8 =
6x^2 -30x -4
f ' (x) = ((x-8)*(2x^2 +x +4) = (x - 8)' * (2x^2 + x + 4) + (x - 8) * (2x^2 +x + 4)'=
= 1 * (2x^2 + x + 4) + (x - 8) * (2 * 2x + 1) =
= 2x^2 + x + 4 + 4x^2 + x - 32x - 8=
= 6x^2 - 30x - 4
ответ. 6x^2 - 30x - 4
f(x)=(x-8)(2x^2+x+4)
f'(x)=(x-8)'(2x^2+x+4) + (x-8)(2x^2+x+4)' = (2x^2+x+4) + (x-8)(4x+1) = 2x^2+x+4 + 4x^2+x - 32x-8 =
6x^2 -30x -4
f ' (x) = ((x-8)*(2x^2 +x +4) = (x - 8)' * (2x^2 + x + 4) + (x - 8) * (2x^2 +x + 4)'=
= 1 * (2x^2 + x + 4) + (x - 8) * (2 * 2x + 1) =
= 2x^2 + x + 4 + 4x^2 + x - 32x - 8=
= 6x^2 - 30x - 4
ответ. 6x^2 - 30x - 4