13 us 4th and 8th derms of an Ap. are u. 11 tahtoon
and 25 respecterely fiNd a and d.
Answers
Answered by
0
Step-by-step explanation:
T4 =11 T8 = 25
a + 3d = 11....i) a + 7d = 25....ii) Subtract ii) from i)
a + 7d = 25
- - -
----------------
- 4d = - 14
d = 14/4
d= 7/2 put in i) eq.
a + 3(7/2) = 11
a + 21/2 = 11
a = 11 - 21/2
= 22-21/2
a = 1/2 ans
mark brainliest
Similar questions