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If the coefficients of the middle terms in the binomial expresion in powers of x of `(1+kx)^(4)` and of `(1-kx)^(6)` are equal then the value of `k (ne 0)` is-

A

`-3/10`

B

`10/3`

C

`3/5`

D

`-5/3`

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The correct Answer is:
A
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