если
[tex]( \frac{1}{4} ) ^{x} + ( \frac{1}{4} ) {}^{ - x} = 7[/tex]
то найдите
[tex]( \frac{1}{2} ) ^{x} + ( \frac{1}{2} ) {}^{ - x} = [/tex]
[tex]( \frac{1}{4} ) ^{x} + ( \frac{1}{4} ) {}^{ - x} = 7[/tex]
то найдите
[tex]( \frac{1}{2} ) ^{x} + ( \frac{1}{2} ) {}^{ - x} = [/tex]
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