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  

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step-by-step explanation: