Question

the 8th term of ap is 32 and its 12th term is 39 find ap

Answer 1

a + 7d = 32 ----1

a + 11d = 39 ----2

Solving 1 and 2

》 4d = 7 》d = 7/4 》 a= 79 / 4

Thus the A.P is 79/4 , 86/4 , 93/4 ,..........

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Answer 2

Answer:

a+7d=32 --------1

a+11d=39-------2

from eq. 1 and 2

by using elimination method ____

a+11d=39

a+7d =32

- - -

______________

4d=7

d=7/4

putting the value of d in eq 1

we get a=79/4

a2=79/4+7/4=86/4

a3=86/4+7/4=93/4

Therefore, the AP is 79/4,86/4,93/4------