If in the expansion of \[{{(1+x)}^{m}}{{(1-x)}^{n}}\], the coefficient of x and \[{{x}^{2}}\]are 3 and - 6 respectively, then m is [IIT 1999; MP PET 2000]

If in the expansion of \[{{(1+x)}^{m}}{{(1-x)}^{n}}\], the coefficient

1.	If in the expansion of \[{{(1+x)}^{m}}{{(1-x)}^{n}}\], the coefficient of x and \[{{x}^{2}}\]are 3 and - 6 respectively, then m is [IIT 1999; MP PET 2000]
A.	6
B.	9
C.	12
D.	24
Answer» D. 24

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If in the expansion of \[{{(1+x)}^{m}}{{(1-x)}^{n}}\], the coefficient of x and \[{{x}^{2}}\]are 3 and - 6 respectively, then m is [IIT 1999; MP PET 2000]

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