The three coefficients
Algebra
Level
2
If coefficients of 2nd,3rd and 4th term in the expansion of are in A.P. Then what is the value of ?
0
1
3
4
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1 solution
2nC2 = (2nC1+2nC3)/2 on solving and simplification, we get qe as 2n^2-9n+7=0