100C0100C2 + 100C2 100C4 +100C4100C6 +.....+. 100C98100C100 = 1/2{ 200C98 _ . 100C49 }Prove it......
100C0100C2 + 100C2 100C4 +100C4100C6 +.....+. 100C98100C100 = 1/2{ 200C98 _ . 100C49 }
Prove it......


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