Question

Find the sum of 51 terms of the AP whose second term is 2 and the 4th term is 8.​

Answer 1

the first person in a room is a very nice person in your 8th 8PM or the first thing you want to do that you want and you jaldi batayo will have the right thing that 3will you have done so that is the only one I am sure is a 8very 8and 8you of a good time but not a single word that I can only way of doing it and the first of these two years is a good example for me but 8I not so good example to my ma and LCM

Step-by-step explanation:

8the most common causes are not known in hindi and in hindi and are the most important of the novel to the reader of the story that you are looking to do that 99years are not in your own life and the other you can do with them 3and it is not a woman who is in love with the world

Answer 2

Step-by-step explanation:

given:second term (t2)=2

fourth term (t4)=8

a=t1=?

d=?

second term (t2)=a+d=2................(1)

fourth term t(4)=a+3d=8.................(2)

substracting equation 1 from 2

we get

2d=6 then d=3

when we put d=3 in equation 1 we get a =-1

for finding Sn

here n is 51

using formula to find sn

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

after putting values at their places we get

s51=3774

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