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[" (b) "(2)(1/18" (b) "5/18" (c) "11/18"...

[" (b) "(2)(1/18" (b) "5/18" (c) "11/18" (d) "13/18],[" all coefficient of the "5" th,"6" th,"7" th term in the expansion of "],[(1+x)^(n)" are in A.P.,then "n" is: "],[[" (a) "4,7," (b) "14,7," (c) "7,3," (d) "4,17]]

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