Use the substitution u = e x to reduce the equation e 2x 8e x +12
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Use the substitution u = ex to reduce the equation e2x − 8ex +12 = 0 to a quadratic equation in u. Factorise this quadratic and hence find the value(s) of u which satisfy it. What are the value(s) of x, correct to two decimal places, which satisfy the original equation?
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e8e 12 e 8e 120 Substituting u e reduces the ...View the full answer
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