C-13-Q064mediumsingle_mcq

$1 + 2 + 3 + \cdots + n = ?$

a $\dfrac{n(n+1)}{2}$
b $\frac{n (n -}{}$

ব্যাখ্যা

The sum of the first $n$ natural numbers is the standard formula $\frac{n(n+1)}{2}$ , obtained by pairing terms from both ends. This is the foundational result of the chapter.

এই অধ্যায়ের আরও প্রশ্ন

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C-13-Q072If , the value of is —
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\frac{n ( n - 1 )}{2}

c

n(n + 1)

d

n^{2}

Finite Series — সব প্রশ্ন দেখুন (160টি) →

1+2+3+⋯+n=?1 + 2 + 3 + \cdots + n = ?1+2+3+⋯+n=?

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

$1 + 2 + 3 + \cdots + n = ?$