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Write the 4th term from the end in the e...

Write the 4th term from the end in the expansion of `((x^3)/( 2) - (2)/(x^2) )^7`.

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4th term from the end in the expansion of `((x^(3))/(2) - (2)/(x^(2)))^(7) `
= 4 th term from beginning in the expansion of
`(- (2)/(x^(2))+(x^(3))/(2) )^(7) `
` ""^(7)C_(3) (-(2)/(x^(2)))^(7-2)((x^(3))/(2))^(3) = (7*6*5*)/(1*2*3) . (2^(4))/(x^(4)) . (x^(9))/(2^(9)) = 70x `
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