Question

How to solve this question

Answer 1

Heya........!!!!

It's Given in the question that :

$\frac{3 {}^{ - 7} }{3 {}^{ - 10} } \\ according \: to \: the \: \: law \: of \: exponents \: \\ \\ (3 {}^{ - 7 + 10} ) \times 3 {}^{ - 5} \: = 3 {}^{3} \times 3 {}^{ - 5} \\ = > 3 {}^{3 - 5} = 3 {}^{ - 2}$


Hope It Helps u ^_^