Question

Find a counterexample for the statement: For all x ≥ 2, 3x ≤ x2.

Answer 1

Its =2. ;)

Answer 2

2 ≥ 2 is true, but 3 • 2 ≤ 2^2 is false.

Answer 3

Preston concludes that, because the quadrilateral shown has congruent diagonals that bisect each other, it must be a rectangle. What type of reasoning is he using?

Answer 4

Hold on ill brb to answer your question :).

Answer 5

Sorry took so long im back now. :):

The answer is he is using Geometric reasoning.

Answer 6

3x<=x^2
x^2-3x>=0
x*(x-3)>=0
x<=0 or x>=3
now x>=2
thus x>=3