Question
13 + 23 + 33 + ... + 63 = ?
13 + 23 + 33 + ... + 63 = ?
Answer: Option B
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Answer : Option B
Explanation :
$MF#%1^3 + 2^3 + 3^3 + \cdots + n^3 = \sum{n^3} = \dfrac{n^2(n+1)^2}{4} = \left[\dfrac{n(n+1)}{2}\right]^2 %$MF#%
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