Question

complete the following activity to find the
19th term of the
A.P,
10, 15, 20,
Here, a= 10 d=()
t 19 = ?
tn=a+()____formula
t19=10+()
(substituting the values)

: . t19 =()​

Answer 1

Step-by-step explanation:

a=10

d=a2-a1

=15-10

d=5

Tn=a+(n-1)d

T19=10+(19-1)5

=10+18×5

=10+90

T19=100