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Which is the general formula for (1+2+3+\cdots+n)?(1+2+3+\cdots+n) का सामान्य सूत्र कौन सा है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (\frac{n(n+1)}{2})(\frac{n(n+1)}{2})
The sum of the first (n) natural numbers is (S_n=\frac{n(n+1)}{2}). This formula is the key formula of this topic.पहली (n) प्राकृतिक संख्याओं का योग (S_n=\frac{n(n+1)}{2}) होता है। यह सूत्र इस अध्याय का मूल सूत्र है।
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