Math, asked by gurveerbagga0, 1 month ago

find the arithmetic mean of an ap with 17 terms whose ninthth term is 11

Answers

Answered by Anonymous
2

Sum of N Terms of AP: S = n/2[2a + (n − 1) × d]

Answered by rahmanzoya237
20

Answer:

17th term of the A.P. is a

17 =a+(n−1)d

Given series is 5,8,11,14,....

Here a=5,d=3,a

17 =?

Therefore, a 17

​=5+(17−1)3

⇒a 17

=5+16×3

⇒a 17 =53

Step-by-step explanation:

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