Exponential and Logarithmic Functions - Solving Exponential Equations Using Substitution
Exponential and Logarithmic Functions - Solving Exponential Equations Using Substitution
Secondary 3
By using an appropriate substitution, solve the equation \(0.2\left( {{2}^{x}} \right)+0.8\left( {{2}^{-x}} \right)=1\).
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Answer:\(x=0\) or \(x=2\)
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