1.

"Prove that "(""^(4n)C_(2n))/(""^(2n)C_(n))=(1.3,5......(4n-1))/({1.3.5....(2n-1)}^(2))

Answer»

`[ 1.3.5. . . (4n-1)][1.3.5 . . .(2n-1)]`
`[1.3.5. . .(4n-1)]:[1.3.5. . . (2n-1)]^2`
`[1.3.5. . . (4n-1)]^2 :][1.3.5. . . (2n-1)]`
`[1.3.5. . .(4n-1)]^2"[1.3.5. . . (2n-1)]^2`

ANSWER :B


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