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Use the formula [tex]$S=\frac{n(n+1)}{2}$[/tex] to find the sum of [tex]$1+2+3+\cdots+460$[/tex].

Sagot :

To find the sum of the series [tex]\(1 + 2 + 3 + \cdots + 460\)[/tex], you can use the formula for the sum of the first [tex]\(n\)[/tex] natural numbers:
[tex]\[ S = \frac{n(n + 1)}{2} \][/tex]
where [tex]\(n\)[/tex] is the last number in the series.

In this problem, the series goes up to 460, so [tex]\(n = 460\)[/tex]. Plugging this value into the formula, we get:

[tex]\[ S = \frac{460 (460 + 1)}{2} \][/tex]

1. First, calculate [tex]\(460 + 1\)[/tex]:
[tex]\[ 460 + 1 = 461 \][/tex]

2. Next, multiply 460 by 461:
[tex]\[ 460 \times 461 = 211060 \][/tex]

3. Finally, divide the result by 2 to find the sum:
[tex]\[ S = \frac{211060}{2} = 105530 \][/tex]

Thus, the sum of the series [tex]\(1 + 2 + 3 + \cdots + 460\)[/tex] is [tex]\(\boxed{105530}\)[/tex].