91- 6303239042
Sum of First $$n$$ Natural Numbers
## Formula
$$1+2+3+\cdots+n=\frac{n(n+1)}2$$
Therefore:
$$\sum_{k=1}^{n}k=\frac{n(n+1)}2$$
## Usage
- Used as a standard summation formula and in AP-based series.
Sign in
Please select an account to continue using cracku.in
↓ →
Sum of First $$n$$ Natural Numbers
## Formula
$$1+2+3+\cdots+n=\frac{n(n+1)}2$$
Therefore:
$$\sum_{k=1}^{n}k=\frac{n(n+1)}2$$
## Usage
- Used as a standard summation formula and in AP-based series.
Start your IIM journey with the right preparation and crack CAT 2026.
Educational materials for CAT preparation
