Quote:
Originally posted by michaelw
-3 < (1/x) <= 1
whats the interval for x
its so simple, i just dont know how to show my work
x>= 1, and x < 0
(>= is greater than or equal to)
|
multiply by x and you got:
I.
-3x < 1
1 <= x
for x >= 0
II.
-3x > 1
1 >= x
for x < 0
from part I, you get x >=1 and x > -1/3, which results in x >= 1
from part II you get x <= 1 and x < -1/3 , which results in x < -1/3
the answer should be:
x >= 1 and x < -1/3
(not 100% sure about this one either actually)
damn its been long since ive done this