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Hi can someone pls solve this

Answer»

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



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