Question

if n term of an ap is an=2n-1 then it's 4th term is​

Answer 1

Answer:

t₄ = 7

Step-by-step explanation:

given tₙ = 2n - 1

so, t₄ = 2(4) - 1

         = 8-1

         = 7

Answer 2

Answer:

The fourth term of the above AP is 7.

Step-by-step explanation:

Given:-

$a_{n}=2n-1$

To find:-

$a_{4}$

Solution:-

$a_{n}=a+(n-1)d$

$a_{n}=2n-1$

$a_{n}=1+(n-1)2$

∴ $a=1, d=2$

$a_{4}=a+(4-1)d\\a_{4}=a+3d\\a_{4}=1+(3\times2)\\a_{4}=1+6\\a_{4}=7$

∴ The fourth term of the above AP is 7.