Question

If first two term of AP are -3,4 then find 12th term

Answer 1

Given
a1= -3
a2 = 4
find - A.P

so, d = a2 - a1
= 4 - ( -3 )
= 4+3
=7
Also, a3 = a +2d
= -3 + 2(7)
= -3 + 14
= 11
and, a4 = a + 3d
= -3 + 3(7)
= -3 + 21
= 18
Therefore, the A.P is
-3,4,11,18......

HOPE IT HELP YOU...

Answer 2

Given ::- first term is -3

Second term is 4

To find ::- 12th term

Solution ::-

Here, a = -3

d = 4 -(-3) = 7

aⁿ = a + (n-1)d

a₁₂ = - 3 + ( 12-1) (7)

= -3 + (11)(7)

= -3 + 77

= 74

Therefore the twelfth term of AP is 74

HOPE IT HELPS YOU!!