Posted by Joshua on .
The 7th term of an A.p is 20 and the 13th term is 38 find the ,1,70thterm ,2,11thterm

Further maths 
Steve,
a+6d = 20
a+12d = 38
so,
a=2
d=3
Can't make out which other terms you want, but knowing a and d should make it easy.