Question

o 4ª termo do desenvolvimento de (x+2)^6 é:

Answer 1

$(x+2)^{6}=x^6+12x^5+60x^4+160x^3+240x^2+192x+64$

O quarto termo é:

$\dbinom{6}{3}\cdot x^{3}\cdot2^3=\dfrac{6!}{3!\cdot3!}\cdot x^3\cdot8=20x^3\cdot8=160x^3$