Question

(4) In an A. P. if a = 2 and t 5 = 12, find t2 ,t3, t4.​

Answer 1

Answer:

t2 = 9/2 & t3 = 7 & t4 = 19/2

Step-by-step explanation:

t 5 = a + 4 d

12 = 2 + 4 d

10 = 4 d

d = 5/2

t2 = a + d = 2 + 5/2 = (4+5)/2 = 9/2

t3 = a + 2 d = 2 + 2(5/2) = 2 + 5 = 7

t4 = a + 3 d = 2 + 3(5/2) = 2 + 15/2 = (4 + 15)/2 = 19/2

Hope it helps u !!!!!!!

Answer 2

Answer:

We have a= 2 & t5 = 12

we know An = a + ( n- 1) d

=> t5 = 12

=> a +( 5-1 )d =12

a + 4d = 12

2 + 4d = 12

=>. d = 10/4 = 5/2

now, t2 = a+d

= 2+5/2 = 9/2

t3 =a+2d

=2+2×5/2 = 7

t4 =a+3d = 2 + 3×5/2 =19/2