Question

if the last term of AP is 8 , 15,22..is 218
then which term is 218.

​

Answer 1

Answer:

a = 8

d = 15-8 = 7

an = 218

an = a + (n-1)d

218 = 8 + (n-1)7

218 -8 = 7n - 7

210+7 = 7n

217 = 7n

n = 217÷7

n = 31

follow me on brainly

Answer 2

Answer:

218 is 31st term of the given A.P..

Step-by-step explanation:

The given A.P. is 8 , 15 , 22 ...

So, its common difference is d = 15-8 = 7

Also, a = 8 and aₙ=218

w.k.t., aₙ = a+(n-1)d

⇒ 218 = 8 + (n-1)7

or 218-8 = (n-1)7

or 210 = (n-1)7

or n-1 = 210/7 = 30

or n = 30+1

⇒ n=31

Please mark it as Brainliest.