Solve, giving your answers to 3 significant figures. a. 2 2x 6(2 x ) + 5
Question:
Solve, giving your answers to 3 significant figures.
a. 22x − 6(2x) + 5 = 0
b. 32x − 15(3x) + 44 = 0
c. 52x − 6(5x) − 7 = 0
d. 32x + 3x + 1 − 10 = 0
e. 72x + 12 = 7x + 1
f. 22x + 3(2x) − 4 = 0
g. 32x + 1 − 26(3x) − 9 = 0
h. 4(32x + 1) + 17(3x) − 7 = 0
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Step by Step Answer:
a To solve the equation 22x 62x 5 0 Lets make a substitution Let y 2x The equation becomes y2 6y 5 0 Factoring the quadratic equation y 5y 1 0 Setting each factor equal to zero y 5 0 y 5 y 1 0 y 1 Sub...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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