05/08/17

Determine if the graph is symmetric about the x-axis, the y-axis, or the origin. r = 2 cos 5θ

I would like for someone to explain how to do this. I don't want just an answer. My guess would be about the x-axis because there is a cosine but I don't think this a correct method to find out the... more

Find the standard form of the equation of the parabola with a focus at (-4, 0) and a directrix at x = 4.

So basically, it's a multiple choice question and I got stuck. So there are 4 options, 2 of them are completley wrong but the other two options are these: y=(-1/16)x^2, x=(-1/16)x^2   This is the... more

04/13/17

Find the sum of the first 12 terms of the sequence. 1, -4, -9, -14, . . . What is the formula that I need to use?

What is the formula that I need to use? The asnwer is obviously -54. 

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