a2=13 a4= 3 find a2 and a3
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Answer:
Given,
:- a2 = 13
a+d = 13 ...... (1)
:- a4 = 3
a+3d = 3 ........ (2)
--> Now, subtract eq. 1 from 2
a+3d = 3
- a+d = 13
——————
2d = - 10
[ D = - 5 ]
And, put the value of D in eq. 1
--> a + (-5) = 3
a = 3+5
a = 8
...................................................
So, we get a=8 and d=-5
Then,
a3 = a+2d
= 8+(-5)
= 8-5
= 3
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