Question

If (–3)m+1 × (–3)5 = (–3)7

, then the value of m is:​

Answer 1

Answer:

heya mate ☺

$( - 3)m + 1 \times ( - 3)5 = ( - 3)7 \\ = > ( - 3)m + 1 \times ( - 15) = ( - 21) \\ = > - 3m + 1 \times ( - 15) = - 21 \\ = > - 3m + ( - 15) = - 21 \\ = > - 3m - 15 = - 21 \\ = > - 3m = - 21 + 15 \\ = > - 3m = - 6( - and - cancelled) \\ = > m = 6 \div 3 \\ = > m = 2$

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Answer 2

GIVEN:

• (-3)m + 1 × (-3)5 = (-3)7

TO FIND:

• The value of m .

SOLUTION:

=> -3m + 1 × (-15) = (-3) × 7

=> -3m + ( -15 ) = -21

=> -3m -15 = -21

=> -3m = -21 + 15

=> -3m = -6

=> m = -6 / -3

=> m = 2

Hence,the value of m is 2