Question

(4) In an A. P. if a = 2 and to = 12, find t,, t, ta 3​

Answer 1

Step-by-step explanation:

a=2

t

5

=12

⇒a+4d=12

⇒2+4d=12

⇒4d=12−2

⇒4d=10

⇒d=

4

10

∴d=

2

5

t

2

=a+d

=2+

2

5

=

2

4+5

=

2

9

=4.5

t

3

=a+2d

=2+2×

2

5

=2+5=7

t

4

=a+3d

=2+3×

2

5

=2+

2

15

= 24+15= 2

19 =9.5

t

2=4.5or4

2

1t

3 =7

t

4=9.