Calculus with Applications (10th Edition)

Published by Pearson
ISBN 10: 0321749006
ISBN 13: 978-0-32174-900-0

Chapter 2 - Nonlinear Functions - 2.5 Logarithmic Functions - 2.5 Exercises: 4

Answer

$\log_{2}$128 = 7

Work Step by Step

The logarithm formula using variables is: $\log_{B}$A = C Using the same variables, the spots they would go in the exponential formula is: B$^{C}$ = A So to write $2^{7}$ = 128 in logarithm form, you first have to look at which number corresponds to which variable in the exponential formula. In this case: 2 corresponds to B 7 corresponds to C and 128 corresponds to A Knowing which number corresponds to which variable in the exponential formula, you can then plug those into the logarithm formula to get your answer which will be: $\log_{2}$128 = 7
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