Question

is minus 7 by 9 the multiplicative inverse of 7 by 9 give reason

Answer 1

No
-7/9 is the additive inverse 7/9 .
Multiplicative inverse refers to reciprocal .
So , -7/9 is not the multiplicative inverse of 7/9

Answer 2

and is in picture . ANS is yes.
I hope you get understand.

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