13. simplify $r^{40}div r^{21}$
13. simplify $r^{40}div r^{21}$
Answer
Explanation:
Step1: Apply exponent - division rule
When dividing two terms with the same base (a^m\div a^n=a^{m - n}), here (a = r), (m = 40), (n=21). So (r^{40}\div r^{21}=r^{40 - 21}).
Step2: Calculate the exponent
(40-21 = 19), so (r^{40 - 21}=r^{19}).
Answer:
(r^{19})