### Home > A2C > Chapter 13 > Lesson 13.2.3 > Problem 13-136

13-136.

Without using a calculator, solve these two problems from a college entrance exam.

If

*x*^{−4/3}+ 1 = 17, find*x*^{−1/3}.Subtract 1 from both sides.

If log(

*A*) =*a*, findSimplify the second log.

Remember that

is to the 2nd power.