Question

find the common diff. of AP whose a=1 ,sum of first 4 terms is equal to 1/3rd of next 4 terms

Answer 1

Answer:

Step-by-step explanation:

sum=4+6d

next 4 terms are 1+4d, 1+5d,1+7d

sum = 4 + 22d

As per condition

4+22d= 3(4+6d)=12+18d

4d=8

d=2