Question

binomial theorem
independent terms formulae

Answer 1

$(a+b)^n= a^n+{}^nC_1\ a^{n-1}b+{}^nC_2\ a^{n-2}b^2+.....+{}^nC_{n-1}\ ab^{n-1}+b^n\\\\each\ term\ is:= T_r= \ \ {}^nC_r\ a^r\ b^{n-r},\ \ \ r=0,1,2,..,n-1,n$