The sum of the 3rd and 7th terms of an a.p is 36, and the 9th term is 37. Find the a.p

3 answers

Just translate into English:
"sum of the 3rd and 7th terms of an a.p is 36"
---> a+2d + a+6d = 36
2a + 8d = 36
a + 4d = 18 ***

"he 9th term is 37" ---> a+8d = 37
a = 37-8d

plug that into *** and solve.
Use your definitions to state the AP
don't really get the answer
please explain it clearly God bless you