数学题1)(x-1)(x+1)=x²-1,(x-1)(x²+x+1)=x³-1,(x-1)(x^3+x^2+x+1)=
(1)(x-1)(x+1)=x²-1,(x-1)(x²+x+1)=x³-1,(x-1)(x^3+x^2+x+1)=猜想(x-1)(x^n+x^n-1+...+x^2+x+1)(2)(x-1)(x^48+x^48+...+x^62+x+1)=(3)(x^20-1)÷(x-1)=若能求写出结果若不能求说明原因