Question

in the given AP find the value of x : 7, x ,19​

Answer 1

Answer: 13

Explanation:

any term of an AP can be represented as

a(n)=a+(n-1)d

a(n)=19

a=7

n=3

We now have to find value of d

so,

19=7+(3-1)d

19=7+2d

12=2d

d=6

now for second term,

a(2nd)=7+(2-1)6

x=7+1×6

x=7+6

x=13