Discover Questions

The planes 2x+3y-z=5 and x-y+2z=k intersect in the line 5x+1=9-5y=-5z. Find the value of k.? Why is the electric potential negative within the negative charge and positive within the positive charge? and total V is the difference? F(x)=[sin(3x)/sin(x)]-[cos(3x)/cos(x)]
a) For what values of x does f(x) not exist?
b) Simplify expression [sin(3x)/sin(x)]-[cos(3x)/cos(x)]? What does it meant to dream of being a magnet to metallic objects? If amplitude is 200 and intensity is 300 when amplitude is increased to 800 then intensity will be?