Question

(i) Complete the following activity to find the 19th term of the A.P.

10, 15, 20, ...

Here, a = 10, d = ? , t19 =?
tn = a + _________ ... (Formula)
... t19 = 10 + ___... (Substituting the values)
... t19 = ____________ .​

Answer 1

Answer:

d= a2-a1

= 5

a19 = a+18d

= 10+18(5)

= 100