Question
Thu February 19, 2009 By:

plzzz.........help.................... harshit............

Expert Reply
Thu February 19, 2009

43 + 39 + 35 + .........+ n term = 252

n / 2 [ 2*43 + (n-1) (-4) ] = 252

===>  4n 2 - 90n + 504 = 0  solving we get  n = 12 , 10.5

so n = 12 (integer)

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