Answer:
f'(x) = 15(5x + 3)²
Explanation:
using the chain rule to differentiate
f(x) = g(h(x) , then
f'(x) = g'(x) × h'(x)
f(x) = (5x + 3)³
f'(x) = 3(5x + 3)² × (5x + 3)
= 3(5x + 3)² × 5
= 15(5x + 3)²
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