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(1-[tex]\frac{1}{2}[/tex]) + (2-[tex]\frac{1}{2}[/tex]) + ...... + (n-[tex]\frac{1}{2}[/tex]) =72 ise n=?

Cevap :

Cevap:

1/2+3/2+5/2.......(2n-1)/2=72

(1+3+5+7+......2n-1)/2=72

n^2=144 ten n=12 olur