Asked by bean

Over which of the following domains is f(x) = csc(0.1x + 1.2) defined at all points and invertible?

a. x = [0,10]
b. x = [10,20]
c. x = [20,30]
d. x = [30,40]

I know it's either a or d since 20 is an asymptote, I'm just not sure which one.
Answered by Steve
It is not (D) because f(x) has a maximum at 35.12

That means that f(x) fails the horizontal line test on the interval (30.24,40), so it is not invertible there.
Answered by mari
its c, i took the practice quiz thing
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