4^x + 4^-x = 23
berarti
2^(2x) + 2^(-2x) = 23
(2^x + 2^-x)² =
2^(2x) + 1 + 1 + 2^(-2x)=
2^(2x) + 2^(-2x) + 2
23 + 2 = 25
(2^x + 2^-x) ² = 25
2^x + 2^-x = √25
2^x + 2^-x = 5
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4^x + 4^-x = 23
berarti
2^(2x) + 2^(-2x) = 23
(2^x + 2^-x)² =
2^(2x) + 1 + 1 + 2^(-2x)=
2^(2x) + 2^(-2x) + 2
23 + 2 = 25
(2^x + 2^-x) ² = 25
2^x + 2^-x = √25
2^x + 2^-x = 5