Question

What is the domain of the following function?

y = -3sec(2pix)

Answer 1

D:{x|x∈R}
no other restrictions

Answer 2

thanks man

Answer 3

no problem :)

Answer 4

This function appears to be undefined at x=.25 radians and selected multiples thereof. These values, I think, should be excluded from the domain. Given that the secant function is discontinuous, I doubt the domain would be the set of Reals.

Answer 5

^ oh that's true actually. i saw that as sine function.

Answer 6

oh, good thing i did not submit the answer yet

Answer 7

D:{x|(x≠1/4+n/2), n∈I x∈R} would be the correct answer i think.
sorry for that haha.

Answer 8

hmm so {x|x≠kpi/4,k is an odd integer)

would be another format to say the same thing?

Answer 9

saying kpi/2, where k is an integer would be a better way of saying it

Answer 10

kpi/2 ?

Answer 11

how does it change from kpi/4

Answer 12

saying kpi/4 and saying that k is an odd integer is kinda bizzare.
saying kpi/2 and saying that k is an integer would be a better way.

Answer 13

just to be clear, you are sure it is kpi/4 and not k/4