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[" **."2." If "2^(" nd "),3^(" rd "),4^(...

[" **."2." If "2^(" nd "),3^(" rd "),4^(" th ")" terms in expansion "(a+x)^(n)" are "],[" respectively "240,720,1080" find a,"x,n],[qquad " (Mar- "2016(TS)," May "-2009,2006)]

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