4x1/4^n-4x1/4^n-1=-12/4^n怎样计算的
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![4x1/4^n-4x1/4^n-1=-12/4^n怎样计算的](/uploads/image/z/7101158-14-8.jpg?t=4x1%2F4%5En-4x1%2F4%5En-1%3D-12%2F4%5En%E6%80%8E%E6%A0%B7%E8%AE%A1%E7%AE%97%E7%9A%84)
4x1/4^n-4x1/4^n-1=-12/4^n怎样计算的
4x1/4^n-4x1/4^n-1=-12/4^n怎样计算的
4x1/4^n-4x1/4^n-1=-12/4^n怎样计算的
4x1/4^n-4x1/4^n-1
=4x4的-n次方-4x4的1-n次方
=4的1-n次方-4x4的1-n次方
=-3x4的1-n次方
=-12/4的n次方
4x1/4^n-4x1/4^n-1=-12/4^n
=4x1/4^n(1-1/4^-1)
=4x1/4^n(1-4)
=4x1/4^n(-3)
=-12x1/4^n
4*1/4^n-4*1/4^(n-1)
=4*1/4^n-4*1/(4^n/4)
=4*1/4^n-4*4/4^n
=4*1/4^n-16/4^n
=-12/4^n