Respuesta :

Ckaranja
a=1
common difference d=3-1=2
nth term= a+(n-1)d
2oth term= 1+(20-1)2
=1+38
=39
erolkayacan

Answer:

The answer is 39.

Step-by-step explanation:

The first term of arithmetic sequence is 1:

[tex]a_{1}=1[/tex]

and the formula of arithmetic sequence is:

[tex]a_{n}=2*n-1[/tex]

20th term of the arithmetic sequence will be:

[tex]a_{20}=2*20-1=39[/tex]