Question

问记到题.急已知（x²-x+1）23次方的展开式是46次多项式,设为a_0+a_1x+a_2x²+…

Answer 1

将x=1代入,即得a0+a1+..a46=(1-1+1)^23=1

4^x 32^y=2^2x* 2^5y=2^(2x+5y)=2^3=8

2x2^3nx2^4n=2^22

1+3n+4n=22

7n=21

n=3