### 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.

Homework Help ✎ If

*x*^{−4/3}+ 1 = 17, find*x*^{−1/3}.If log(

*A*) =*a*, find

Subtract 1 from both sides.

2

Simplify the second log.

log(A) − log(100)

Remember that 100 is 10 to the 2nd power.

log(A) − 2

*a* − 2