Question

determine the ap whose 3rd term is 5 and 7th term is 9​

Answer 1

Step-by-step explanation:

given a3=5 and a7=9

a+2d=5=a3. a+6d=9=a7

solving both equations we get

4d=4

d=1

substituting value of d in any above two equation,we get

a=3

therefore

AP:a,a+d,a+2d

so AP will be 3,4,5.....