CPM Homework Help : PC3 Problem 3-126

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Home > PC3 > Chapter 3 > Lesson 3.2.3 > Problem 3-126

3-126.

Compute without a calculator Solve each equation.

$2^x=8^{(x-1)}$
Step (a):
$2^x=(2^3)^{(x-1)}$

$4^{-x}=8^{(x+2)}$
Step (b):
$(2^2)^{-x}=(2^3)^{(x+2)}$

$7^{(x+3)}=1$
Hint (c):
Any number to what power equals $1$ ?

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