melsramirez27 melsramirez27

01-04-2020
Mathematics

contestada

What is the sum of these first 36 terms 1+4+7+...+103+106

Respuesta :

pawanbastakoti681 pawanbastakoti681

01-04-2020

So,

first term(a)=1

last term(l)=106

no of terms(n)=36

Sn=n/2(a+l)

=18(107)

=1926

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