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Question #51696

1 Answer

sankarankalyanam

Jan 28, 2018

Fifth term is $color(green)( 2160x^2y^4)$

Explanation:

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It is 1 6 15 20 15 6 1

$a = 3x, b = -2y$

Fifth term is

$15(3x)^2(2y)^4 = 2160x^2y^4$

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