Question

find the value of m so that (-3)powerm-1×(-3)power5=(-3)power7​

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 x (-3)⁻⁵

(-3)ⁿ⁻¹ = (-3)⁷⁻⁵

(-3)ⁿ⁻¹ = (-3)²

If base are same then there powers will also same

n - 1 = 2

n = 2 + 1

n = 3

m is not available in subscripts so n is used in place of m

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