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nalin [4]
3 years ago
10

Use Gauss's approach to find the sum for 1+2+3+4+...+999

Mathematics
2 answers:
borishaifa [10]3 years ago
8 0
Sn=(a₁+an)n/2

Data:
a₁=1
an=999
n=999

Sn=(1+999)*999 /2=(1000)*999/2=999000/2=499500

Answer: the sum is 499500
kow [346]3 years ago
4 0
1+999=1000
\frac{999}{2}
=499.5

The sum
=1000*499.5
=499500

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