Question

three terms are in ap if 2nd term is 4 then find the sum of three terms
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Answer 1

Answer:

term are in AP can be a-d, a , a+d

here second term is 4 therefore a = 4

their sum is a-d + a +a +d = 3a

put a = 4

then sum of three terms is 12

hope this will help you

Answer 2

Answer:

let the terms be a-d , a , a+d

since second term is 4

so a=4

their sum=a-d+a+a+d =3a =3*4

=12