Question

Find the 12th term of the AP 16, 9, 2, –5, …

Answer 1

Step-by-step explanation:

Question : Find the 12th term of the AP 16, 9, 2, –5, …

Solution :

The given AP is 16 , 9 , 2 , -5 , .......

Common difference , d = a2 - a1

= 9 - 16 = -7

First term , a = 16

n = 12

An = a + ( n - 1 ) d --eq. 1

we have to find the 12th term of AP

Now,

Put the value of a , n , d in eq.1 we get

A12 = 16 + ( 12 - 1 ) (-7)

= 16 + ( 11 ) (-7)

= 16 - 77

= -61

Hence ,

the 12th term of AP is -61 .

Answer 2

Answer:

a₁₂=(-61)

Step-by-step explanation:

Given:- a=16, d=(-7),n=12

To Find:-a₁₂

Solution:-

aₙ=a+(n-1)d

a₁₂=16+(12-1)(-7)

a₁₂=16+(11)(-7)

a₁₂=16-77

a₁₂=(-61)