Whats the twentieth term of this arithmetic sequence: a sub 1 = 3 and d=7

Arithmetic Sequence

The value of the 20th term of this arithmetic series is 136

Step-by-step explanation:

The first term of the arithmetic term is a = 3

and the common difference is d = 7

So the 20th term of this arithmetic progression is given by

an = a + (n-1) * d

where an is the nth term of the arithmetic progression

so for nth term, the value of n = 20

⇒ a20 = 3 + (20-1) * 7

⇒ a20 = 3 + 19 * 7

⇒ a20 = 3 + 133

⇒ a20 = 136

Hence, the value of the 20th term of this arithmetic series is 136