Question

calcule a soma de 1 ate 99 passo a passo
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Answer 1

Soma dos termos de 1 a 99!

a1 → 1

n→ 99

r→ 1

an → 99

sn → ?

___________

sn=(a1+an)·n/2

s99=(1+99)·99/2

s99=100·99/2

s99=9900/2

s99=4900