| Exam Board | CAIE |
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| Module | P3 (Pure Mathematics 3) |
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| Year | 2004 |
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| Session | June |
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| Topic | Quadratic Functions |
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4
- Show that if \(y = 2 ^ { x }\), then the equation
$$2 ^ { x } - 2 ^ { - x } = 1$$
can be written as a quadratic equation in \(y\).
- Hence solve the equation
$$2 ^ { x } - 2 ^ { - x } = 1$$