rewrite using a single positive exponent.\n\\frac{4^{9}}{4}

Explanation:

Step1: Use the rule of exponents $\frac{a^m}{a^n}=a^{m - n}$

Here, $a = 4$, $m=9$, and $n = 1$ (since $4=4^1$). So, $\frac{4^9}{4^1}=4^{9-1}$

Step2: Calculate the exponent

$9 - 1=8$, so $4^{9 - 1}=4^8$

Answer:

$4^8$