If the second, third and fourth term in the expansion of \[{{(x+a)}^{n}}\] are 240, 720 and 1080 respectively, then the value of n is [Kurukshetra CEE 1991; DCE 1995, 2001]

If the second, third and fourth term in the expansion of \[{{(x+a)}^{n

1.	If the second, third and fourth term in the expansion of \[{{(x+a)}^{n}}\] are 240, 720 and 1080 respectively, then the value of n is [Kurukshetra CEE 1991; DCE 1995, 2001]
A.	15
B.	20
C.	10
D.	5
Answer» E.

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If the second, third and fourth term in the expansion of \[{{(x+a)}^{n}}\] are 240, 720 and 1080 respectively, then the value of n is [Kurukshetra CEE 1991; DCE 1995, 2001]

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