Question

In an



a.P., the first term is 2, the last term is 29 and sum of terms is 155. Find the common difference of



a.P

Answer 1

Answer:d=3

Step-by-step explanation:

a=2 , tn=29 ,Sn=155

Now we have the formulae,

Sn=n/2 [a+tn]

155=n/2[2+29]

n=155×2/31

n=10

Now we need to find the value of d

tn=a+(n-1)d

29=2+(9-1)d

d=27/9=3