写出计算结果:(x-1)(x+1)=______ (x-1)(x2+x+1)
题型:解答题
问题:
写出计算结果:(x-1)(x+1)=______
(x-1)(x2+x+1)=______
(x-1)(x3+x2+x+1)=______
根据以上等式进行猜想,可得:(x-1)(xn+xn-1+…+x+1)=______.
写出计算结果:(x-1)(x+1)=______
(x-1)(x2+x+1)=______
(x-1)(x3+x2+x+1)=______
根据以上等式进行猜想,可得:(x-1)(xn+xn-1+…+x+1)=______.