1) g(x) = 7x
g'(x) = 7(x)' = 7
2) f(x) = 5x²
f'(x) = 5(x²)' = 5 * 2x = 10x
3) f(x) = Cosx
f'(x) = (Cosx)' = - Sinx
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Verified answer
1) g(x) = 7x
g'(x) = 7(x)' = 7
2) f(x) = 5x²
f'(x) = 5(x²)' = 5 * 2x = 10x
3) f(x) = Cosx
f'(x) = (Cosx)' = - Sinx