Respuesta:
Explicación paso a paso:
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(2^2+1) x 2^x-1 = 20
(4 + 1) x 2^x-1 = 20
5 x 2^x-1 = 20
2^x-1 = 4
2^x-1 = 2^2
x-1 = 2
x = 2 + 1
x = 3
7^x-1 = 49^x-1
7^x-1 = 7^2x-2
x - 1 = 2x - 2
x - 2x = -2 + 1
-x = -1
x = 1
Respuesta:
Explicación paso a paso: