Attempt following question by selecting a choice to answer.
f
If
y = - 3 x2e- 8x, then
find y′.e fA.
f3
e-8xx(1 - 8x)B.
f6
xe-8x(1+4x)C.
f- 3
e-3x(x2+2x)D.
f3
x e- 8x (8
x - 2)
f
D
Step 1: y′ = - 3x2.(- 8e- 8x) + e- 8x (- 6x)[Use product rule.]
Step 2: = 24x2e- 8x - 6x e- 8x
Step 3: = 3x e- 8x (8x - 2)