1.

Intheisan A.P the 20 tem is 40sum of 3rd and sth them16 find the A.P.​

Answer»

Answer:

A.p of 20 TERM is 40.

Then , a + 19d= 40 -(I)

= And the sum of 3rd and 5th term is 16.

a + 2d + a + 4d = 16

2a + 6d = 16

-( TAKE 2 common )

a + 3d = 8(ii)

we get TWO equation ,

subtract equation ii by equation I

a +19 d =40

a + 3d =8

= 16d =32

d =2

PUT the value of d in any equation .

Then , you will be get first term (a).

After , you will be get an A.P.



Discussion

No Comment Found

Related InterviewSolutions