Let a, b∈g, where g is a group. then which one of the following statement is not true.
a)if a, b,ab have same order then ab=ba
b)if a^3=e, the identity element of g and aba^-1=b^2 then order of b=16
c)ab and ba have same order
d)b and aba^-1 have same order

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1