2的n次方+2的n次方-3×2的n+1次方等于几?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/26 12:59:01
2的n次方+2的n次方-3×2的n+1次方等于几?2的n次方+2的n次方-3×2的n+1次方等于几?2的n次方+2的n次方-3×2的n+1次方等于几?2^n+2^n-3×2^(n+1)=2×2^n-3

2的n次方+2的n次方-3×2的n+1次方等于几?
2的n次方+2的n次方-3×2的n+1次方等于几?

2的n次方+2的n次方-3×2的n+1次方等于几?
2^n+2^n-3×2^(n+1)
=2×2^n-3×2^(n+1)
=2^n-3×2^(n+1)
=-2×2^(n+1)
=-2^(n+2)