Question

12,16,20,24
Find next two terms
find S²⁰​

Answer 1

Answer: The 20th term of the series is35

Step-by-step explanation:

Given series,

12,16,20,24

Here the first term is f=12

Common difference=4

(Third term-second term=20-16=4

Second term-first term=16-12=4)

Next two terms are,24+d=24+4=28

=28+4=32

12,16,20,24,28,32

To find the nth term using the formula,

an=f+(n-1)d

We have to find the 20th term,

S20=12+(20-1)4

=12+19x4

=12+23

=35

Thus, we get the 20th term of the series is35