1.

If the coefficients of r^(th) , (r+ 1)^(th) and (r + 2)^(th) terms in the binomial expansion of (1 + y)^m are in A.P. then m and r satisfy the equation

Answer»

`m^2 - m (4R - 1) + 4r^2 + 2 = 0`
`m^2 - m(4r+ 1) + 4r^2 - 2 = 0`
`m^2 -m (4r + 1) + (4r^2 + 2) = 0`
`m^2 - m (4r - 1) + 4r^2 - 2 = 0`

Answer :B


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