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stefany68
@stefany68
October 2020
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Achar a soma dos 60 primeiros termos da p.a.(2,5,...)
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Lucas7XD
Verified answer
An=a1+(n-1).r
An=2+(60-1).3
An=2+59.3
An=2+177
An=179
======================
Sn=(a1+an).n/2
Sn=(2+179).60/2
Sn=181.60/2
Sn=10.860/2
Sn=5.430 ///
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lamacch
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lamacch
Vlw pela escolha!
stefany68
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Verified answer
An=a1+(n-1).rAn=2+(60-1).3
An=2+59.3
An=2+177
An=179
======================
Sn=(a1+an).n/2
Sn=(2+179).60/2
Sn=181.60/2
Sn=10.860/2
Sn=5.430 ///
Verified answer