Question

Find value of m so that (–3)m- 1 X (–3)5 = (–3)7​

Answer 1

Answer:

m is 3

Step-by-step explanation:

(–3)ⁿ ⁻¹  X (–3)⁵ = (–3)⁷

(-3)ⁿ⁻¹ = (-3)⁷/(-3)⁵

(-3)ⁿ⁻¹ = (-3)⁷⁻⁵

(-3)ⁿ⁻¹ = (-3)²

If base are equal then power will also same:

So,

n - 1 = 2

n = 2 + 1

n = 3

n is used in place of m because m is not given in subscripts..

Take care..