Thread: Final in 2 hours, Zeros, amplitude, period etc

1. find the zeros of

I got 0,-7,3 was hoping someone could do it and see if they get the same answer.

2.
I got no real zeros

3. Find the amplitude, period and phase shift.
I got: amplitude = 1, period = pi, phase shift = pi/2

Any help on any of them is EXTREMELY welcome. Thanks a million
*edit* just put this in the pre calc help area seeing as I think I will get replys quicker and then noticed in the rules not to double post and I dont want to be a pest there a delete button for the entire thread?

Originally Posted by Garface

1. find the zeros of

I got 0,-7,3 was hoping someone could do it and see if they get the same answer.

2.
I got no real zeros

3. Find the amplitude, period and phase shift.
I got: amplitude = 1, period = pi, phase shift = pi/2

Any help on any of them is EXTREMELY welcome. Thanks a million
*edit* just put this in the pre calc help area seeing as I think I will get replys quicker and then noticed in the rules not to double post and I dont want to be a pest there a delete button for the entire thread?

Hi

1. 0,-7,3 are the zeros of but you have also to find the zeros of

2. OK since

3. OK

For number one I didnt think there were any real zeros of the left hand side of the equation or at least not any that i could find. Graphing it I noticed that the parabola did cross the x axis but i tried using those numbers and it did not come out to exact zeros.

Have you tried the quadratic equation?



For a quadratic of the form: