Question

find sum of 5+8+11+to terms using the formula



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Answer 1

Answer:

Sn formula= Sn= 2a +(n-1)d

Step-by-step explanation:

a=5

d=3

using sn formula we get,

for example till 10 terms

Sn = 2a+(n-1)d

10= 2*5+(10-1)3

10=10+9*3

10=10+27

10=37

HOPE THIS MAY HELP YOU