2^x-a/2^x = 1/2^x - a*2^x怎么变成2^x-a/2^x = 1/2^x - a*2^x怎么变成 (1 - 2^(2*x)) (1+ a) = 0?

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2^x-a/2^x = 1/2^x - a*2^x怎么变成2^x-a/2^x = 1/2^x - a*2^x怎么变成                         (1 - 2^(2*x))  (1+ a) = 0?

2^x-a/2^x = 1/2^x - a*2^x怎么变成2^x-a/2^x = 1/2^x - a*2^x怎么变成 (1 - 2^(2*x)) (1+ a) = 0?
2^x-a/2^x = 1/2^x - a*2^x怎么变成

2^x-a/2^x = 1/2^x - a*2^x怎么变成                         (1 - 2^(2*x))  (1+ a) = 0?

2^x-a/2^x = 1/2^x - a*2^x怎么变成2^x-a/2^x = 1/2^x - a*2^x怎么变成 (1 - 2^(2*x)) (1+ a) = 0?