find the sum 1+2+3+......+100.
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HEYA !
We know that the formula
Sum of first n natural number
= n (n + 1) / 2
Coming the question ,
1 + 2 + 3 + . . . + 100
Here , n = 100
Therefore,
1 + 2 + 3 + . . . + 100 = 100 (100 + 1) / 2
= 100 × 101 / 2
= 50 × 101
= 5050
Hence,
The answer is 5050
We know that the formula
Sum of first n natural number
= n (n + 1) / 2
Coming the question ,
1 + 2 + 3 + . . . + 100
Here , n = 100
Therefore,
1 + 2 + 3 + . . . + 100 = 100 (100 + 1) / 2
= 100 × 101 / 2
= 50 × 101
= 5050
Hence,
The answer is 5050
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