Math, asked by kishoredirector999, 10 months ago

find the sum of the first 30 terms of an ap 5 8 11 14

Answers

Answered by innocent49

3

Step-by-step explanation:

A=5

D=8-5=3

sn = n\2(2a+n-1) *d

so; 30\2(2*5+30-1)*3

25 (10+29)*3

25(39)*3

975*3 = 2925

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