Question

FIND M SO THAT (-3)m+1 x (-3)5= (-3)7

Answer 1

-3^(m + 1) × -3^(5) = -3^7

-3^(m + 1 + 5) = -3^7

-3^(m + 6) = -3^7

m + 6 = 7

m = 7 - 6

m = 1


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Answer 2

-3m = -21 + 15 = -6
m=2