Mathematics
posted by Oyediran on .
The 3rd and 8th term of an arithmetic progression A.P are 9 and 26.what their common difference nd first term?

the terms differ by 5d, so 5d=35, d=7
a+2d = a+14 = 9, so a = 23
23 16 9 2 5 12 19 26 33 ...