已知:2x乘(x n次方+2)=2x n+1次方-4,求x的值
问题描述:
已知:2x乘(x n次方+2)=2x n+1次方-4,求x的值
帮帮忙,Thank you!
答
2x*(x^n+2)=2x^( n+1)-4
2x^(n+1)+4x=2x^(n+1)-4
4x=-4
x=-1