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
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
don't really get the answer
please explain it clearly God bless you