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2 years ago

9

1. What is the fourth term in the expansion of (x + 4y)^6?

1 answer:

aev [14]2 years ago

7 0

For the fourth term r = 3
Fourth term = 6C3(x)^(6 - 3) (4y)^3 = 20x^3 (64y^3) = 1,280x^3y^3

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