Saved Bookmarks
| 1. |
In an APgiven d=5, S9=75,find a and a9 |
|
Answer» Answer: d=5,s 9
=75 s 9
= 2 9
[2a+(9−1)5] 75= 2 9
[2a+40] 150=9[2a+40] 150=18a+360 150−360=18a −210=18a 18 −210
=a a= 3 −35
a 9
=a+(9−1)5 a 9
= 3 −35
+40 a 9
= 3 −35+120
a 9
= 3 −85
Step-by-step explanation: MARK as Brainliest❣️ |
|