How to find a ratio of exponents

Practice Questions

ACT Math › How to find a ratio of exponents

Questions

5

1

If $x^{2}=25$ and $y^{4}=81$ , then which of the following CANNOT be the value of ?

2

If and are positive integers and , then what is the value of $\frac{m}{n}$ ?

3

Write the following logarithm in expanded form:

$\log x^{2}y$

4

If and are both rational numbers and $4^{m} = 8^{n}$ , what is $\frac{m}{n}$ ?

5

If $\frac{n^{y}}{n^{x}}=n^{6}$ for all $\dpi{100} \small n$ not equal to 0, which of the following must be true?

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