Question

the nth term of an ap an=24-3n then its 2nd term is..
A)18
B)15
C)0
D)2​

Answer 1

Answer:

18

Step-by-step explanation:

This question is simple since we already have the formula so what remains is just substitution.

According to the formula:

an = 24 - 3n

Where n is the number of terms

We would like to get the second term so in this case n = 2

We substitute this in the given formula as follows :

a2 = 24 - 3 × 2

= 24 - 6 = 18

The second term is given as 18.

Answer 2

The required "option B) 15" is correct.

Step-by-step explanation:

The given nth term of an ap $a_n$ = 24 - 3n

To find, the 2nd term of the given series = ?

Put n = 1, 2, 3, 4, 5, ............., n

Put n = 1, 1st term of an A.P.

$a_1$ = 24 - 3(1)

= 24 - 3

= 21

Put n = 2, 2nd term of an A.P.

$a_2$ = 24 - 3(2)

= 24 - 6

= 18

∴ The 2nd term of the given series ($a_2$ ) = 18

Thus, the required "option B) 15" is correct.