Question

calcule a integral indefinida ∫ (3x)^3 . 2 dx?

Answer 1

$\int\ {(3x)^{3} *2} \, dx = \int\ {27x^{3}*2} \, dx = 54\int\ {x^{3} } \, dx\\= 54[\frac{x^{4}} {4} ] = \frac{27x^{4} }{2}$