Question

please help me in this ans​

Answer 1

Answer:

l don't know

because I have not study this chapter.

Answer 2

Option (b)

7/8

Step-by-step explanation:

${ (\frac{1}{4} )}^{ - 2} - { (\frac{1}{3} )}^{ - 2} = {4}^{2} - {3}^{2} \\ 16 - 9= 7 \: \: \: \: \: \: \: ....(1) \\ \\ { (\frac{1}{2}) }^{ - 3} = {2}^{3} \\ = 8 \: \: \: \: \: \: \: ....(2) \\ (1) \div (2) \\ = > \frac{7}{8}$