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Math Magic 11

______________________________ √1³ + 2³ + 3³ + 4³ + 5³ +......+99³ = ? Formula  {k × (k +1)} /2 where k is a last number. इसे इस प्रकार सॉल्व करें            _______              ______ Q. 1 √(1³ + 2³ )    =   √(1 + 8) = √9=3 Last No. = 2  Then  = {2 × (2 +1)} /2 = {…

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