Question

AP 5th term is 11 and 9th term is 7 . Find the 16th term

Answer 1

Step-by-step explanation:

AP 5th term=11

a+4d=11

9th term =7

a+8d=7

4d=-4

d=-1

a=15

16th term =a+15d=15-15=0

Answer 2

Answer:

HEY MATE... here is your answer

Step-by-step explanation:

a5 = 11

a + 4d = 11 …… (1)

a9 = 7

a + 8d = 7 ……….. (2)

(1) - (2)

4d – 8d = 11 – 7

–4d = 4

d = -1

a + 4(–1) = 11

a – 4 = 11

a = 15

n = 16

Now, a16 = 15 + (16 – 1)(-1)

a16 = 15 – 15

a16 = 0