Question

2] If 4, X1, X2 ,X3, and 28 are in AP, then x3, is
A] 18
B] 19
C] 22
D] 23

​

Answer 1

Answer:

a=4 n=5 l=28 then an=a+(n-1)d

28= 4+4d

4d=24

d=6 then x3= 22 ok bro

I hope you it will be help

Answer 2

Answer:

a=4,a5=28

a5=a+4d

28=4+4d

28=4(1+d)

7=1+d

d=6

x3=a4=a+3d=4+3(6)=4+18=22

[C] 22 is correct