Question

Which is a counterexample that disproves the conjecture?

A student concludes that if x is a positive real number, then

Answer 1

\[x \ge \sqrt{x}\]

Answer 2

a x = 0
b x = 0.25
c x = 3
d x = 1

Answer 3

try a number from the interval \((0,1)\)

Answer 4

oh that makes the problem much simpler, just plug in there your options and see what happens :-)