nehadani nehadani
  • 17-04-2015
  • Mathematics
contestada

Prove that mn < 0 if and only if m > 0 and n < 0 or m < 0 and n > 0

Respuesta :

dtude dtude
  • 18-04-2015
Only one number can but negative for it to be true.

If both positive then product is positive

If both negative then product is also positive

(-1)*(-1)=1
Answer Link

Otras preguntas

Hey can anyone pls write who is diana ross in ur own words!!!!!
A satellite travels in a circle at 100m/s. Compare the satellites speed and velocity.
How much force is needed to accelerate an object of mass 90 kg at a rate of 1. 2 m/s2?.
where in south Africa is the study area located​
......................​
Graph the parabola. y=3x²-4 Plot five points on the parabola: the vertex, two points to the left of the vertex, and two points to the right of the vertex. Then
Write a paragraph of the ways new military technology enabled the United States to fight successfully on multiple fronts (minimum of 5 sentences AND between 150
Use the following function rule to find f(2). f(x) = 8 (10)^x F(2)=
If Olivia solves every sixth math problem and Nora solves every fifth math problem in a worksheet, which question will be the first that they both solve?
How to write 246,305 in expanded notation