In the expansion of (2m-3n)^9, one of the terms contains m^3. determine the exponent of n in this term.

•2

•3

•5

•6

The correct option is 6

Step-by-step explanation:

Given expression,

By the binomial expansion,

Where,

Thus,

For finding the term containing

9 - r = 3

⇒ 9 - 3 = r

⇒ r = 6

i.e. the required term is,

Hence, the power of n in that term = 6.

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