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1. 1^3 + 2^3 + 3^3 + 4^3 + ............... + 20^3 = কত?
- A. 44000
- B. 44000
- C. 44000
- D. 44000
Answer: Option B
Explanation:
Sum=[{n×(n+1)}/2]²
={(20×11)/2}²
=110²
=12100
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1. 1^3 + 2^3 + 3^3 + 4^3 + ............... + 20^3 = কত?
Answer: Option B
Explanation:
Sum=[{n×(n+1)}/2]²
={(20×11)/2}²
=110²
=12100
Post your comments here: