Question

1,3,5,7, find the 20th term​

Answer 1

Answer:

Mark as brainlest

Step-by-step explanation:

This is clearly an arithmetic sequence because the terms differ by 2 each time.

To find the nth term rule we need:

a value for the first term , a

and a value for the common difference d .

These values are then plugged into the formula:

Tn=a+(n−1)d

a=1andd=2

Tn=a+(n−1)d

Tn=1+(n−1)2

Tn=1+2n−2

Tn=2n−1

Answer 2

Answer:

39

Step-by-step explanation:

A(n)=a+(n-1)d

here a=1,d=2,n=20

so,

a(20)=1+(20-1)×2

a(20)=1+19×2

a(20)=1+38

a(20)=39

hence,the 20th term is 39.