Question

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Answer 1

El grado absoluto no es más que la suma de todos los exponentes de la variable.

$M(x)=4n(x^{3})^{n-1} (x^{4} )^{n+2} =4.n.x^{3(n-1)}.x^{4(n+2)} =4.n.x^{(3n-3)+(4n+8)}=4.n.x^{7n+5}$

Entonces decimos:

7n + 5 = 40

7n = 35

n = 5

El coficiente es "4n" : 4(5) = 20