Question

if -1+2x ,5,5+x are in A.p. find x​

Answer 1

1+2x,5,5+x is in ap

10 = 1+2x +5+ x

10 = 6 + 3x

3x= 4

x= 4/3

Answer 2

Step-by-step explanation:

a=-1+2x,

a+d=5 then

a=5-d that is -1+2x=5-d................(1)

5+d=5+x (a1+d=a2)

d=(5+x)-5

d=x then sub in eqn (1)

-1+2x=5-x

2x+x=5+1

3x=6 then

x=2