Answer:
f(a+h) = 2(a+h)³ = 2a³+6a²b+6ab²+2b³
Explanation:
f(x) = 2x³
f(a+h) = 2(a+h)³
The question is not clear on how the answer should be presented.. but if you need to expand and simplify.......then:
f(a+h)
= 2(a³+3a²b+3ab²+b³)
= 2a³+6a²b+6ab²+2b³