rarmeli rarmeli

12-06-2016
Mathematics

contestada

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

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Аноним Аноним

12-06-2016

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

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Ckaranja Ckaranja

13-06-2016

1+999=1000
[tex] \frac{999}{2} [/tex]
=499.5

The sum
=1000*499.5
=499500

Answer Link

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