# Math Help - Limits question... quick

1. ## Limits question... quick

Ok so I am new to calculus and have come up to 3 questions in my book that I am not sure... Could someone help!

lim (x/x)
x→0

lim f(t) where f(t) = sin^2 (pie t), t < -2
x→-2 2t-4, t >= -2

lim ((1/x)-(1/|x|))
x→0+

For now I have 1 for the first one and does not exist for the other two...Can anyone confirm please?

2. The first one is correct.

Can't read the second one. But we eat pie and $\pi$ is the number pi. Try using LaTeX.

Third one: if $x>0$ then $\dfrac{1}{|x|}=\dfrac{1}{x}$.