Question

find the 1 st term of the AP whose 3rd term is 5 and 7 th term is 9​

Answer 1

Answer:

please refer to the photo for the answer

Answer 2

a=?
d=?
3rd term of the AP=5
7th term of the AP=9
.
.
a+2d=5————-eq.1
.
a+6d=9————-eq.2
.
from (2) nd (1) eq.
.
a+6d-a-2d=9-5
4d=4
d=1
.
Therefore, putting in (1)
.
AP = 3,4,5,6,7——