Question

1 point
11. Find the value of 'x' so that -6,X, 8 are in A.P *
Your answer
1 point
12. Find the common difference of the A.P whose third and seventh terms
are 13 and 19.
Your answer

Answer 1

Answer:

11 ka answer ha x=7.

12 ka answer ha d=3/2

Step-by-step explanation:

(11)answer. Let,second term =x

so,

second term-first term =third term-second term

x-6=8-x

x+x=8+6

2x=14

x=14/2

x=7

(12)answer..

third term =13

seventh term =19

Now,

a+2d=13....(1)

a+6d=19...(2)

from eq-(2)and(1)

a+6d-(a+2d)=19-13

a+6d-a-2d=6

a-a+6d-2d=6

4d=6

d=6/4

d=3/2

Hence,

common difference =3/2