a7=32 and a13= 62
We can write 7th term ( a7) as -
a7=a+6d
32=a+6d ---- equation 1
Similarly -
a13=a+12d
62= a+12d ------ equation 2
Using elimination method , subtracting equation 2 and 1 ,
U will get -
d=5 and substituting this value of d in equation 1 -
32= a+6?5
32=a+30
Therefore -
a =2
Now you can form you arithmetic progression if you know your first term and the common difference ---
AP: 2 , 7 , 12 , 17 ,..........
Hope it will help you.. Do tell me..
By the way from which school you are ? Please let me know.
