1.

Solve: x5(3 – 6x-9).

Answer»

Let y = x5 (3 – 6x-9)

\(\frac{dy}{dx}\) = x5(+54x-10) + (3 – 6x-9)(5x4

= 54x-5 + 15x4 – 30x-5 

= 24x-5 + 15x4



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