Question

5. Find whether

(i) 210 is a term of the AP; 2,6,10,…

(ii) 68 is a term of the AP: 7,10, 13, 16,…​

Answer 1

Answer:

tn=a+(n-1)d

210=2+(n-1)4

208=(n-1)4

208/4=n-1

54=n-1

n=55

therefore 210 is 55th term of the ap