a. Using the substitution u = 2 x , show that the equation 4 x 2
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a. Using the substitution u = 2x, show that the equation 4x − 2x + 1 − 15 = 0 can be written in the form u2 − 2u − 15 = 0.
b. Hence solve the equation 4x − 2x + 1 − 15 = 0, giving your answer to 2 decimal places.
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a To show that the equation 4x 2x 1 15 0 can be written in the form u2 2u 15 0 using the substitutio...View the full answer
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Related Book For 
Edexcel AS And A Level Mathematics Pure Mathematics Year 1/AS
ISBN: 9781292183398
1st Edition
Authors: Greg Attwood
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