Question

calcule o quarto termo do desenvolvimento de [x+a²]^7

Answer 1

[x+a²]^7 => A=x, b=a², n=7, p=4-1=3

t(p+1)= C(n, p). A^n-p. b^p

t(3+1)= C(7, 3). x^7-3. (a²)³

t(4) = 7.6.5/3!. x⁴. a^6

t4 = 210/6 .x⁴.a^6

t4 = 35 x⁴ a^6