Question

Simplify $5^{10}\times 5^{30}\times 5^{40}$

• A. $5^{-80}$
• B. $5^{80}$
  
• C. $5^{90}$
• D. $5^{-90}$

Answer 1

The correct option is B $5^{80}$


By the laws of Exponets, we know that $a^m+a^n=a^{m+n}$
$\Rightarrow$$5^{10}\times 5^{30}\times 5^{40}=5^{10+30+40}=5^{80}$