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Elenna [48]
3 years ago
6

1+2+3+4+5+6.......+99 what is the quickest way to find the answer Thank u

Mathematics
2 answers:
Furkat [3]3 years ago
8 0

1+2+3+4+5+6+\ldots+99=\\(1+99)+(2+98)+\ldots+(49+51)+50=\\49\cdot100+50=\\4950

serious [3.7K]3 years ago
3 0

Answer:

Step-by-step explanation:

Use the formula Sum = (a + L)*n/2

The tricky part is n. That's the number of terms between 1 and 99 inclusive.

n = 99 -1 + 1 = 99

n = 99

a = 1

L = 99

Sum = (1 + 99)*99 / 2

Sum = (100)*99/2

Sum = 4950

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