Question

hi can someone pls solve this

Answer 1

Answer:

answer is (7)^-2

Step-by-step explanation:

here..,

=3√(343)^-2

=3√1/343×343

=3√1/7×7×7×7×7×7

={1/(7^6)}^1/3

=(1/7^2)

=7^-2