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Martin




PostPosted: Wed Jul 28, 2004 11:59 am   Post subject: Math Question

This one seems really easy, but my answer doesn't match the one in the back of the book. Yeah, Mr. White would kill me for saying that (and probably for asking this question too)

Anyway, here it is:
ax^3 + bx^2 - x

If divided by x - 1, remainder is 7
If divided by x + 3, remainder is 33.

Find a and b.
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Martin




PostPosted: Wed Jul 28, 2004 12:03 pm   Post subject: (No subject)

Nevermind. Seems my problem is that I can't do synthetic division...
Martin




PostPosted: Wed Aug 04, 2004 1:35 pm   Post subject: (No subject)

New question. Why am I so stupid lately?

(2x -1) / (x -4) > 1, where x != 4

Solve for x
AsianSensation




PostPosted: Wed Aug 04, 2004 1:49 pm   Post subject: (No subject)

x < -3 and x > 4
Martin




PostPosted: Wed Aug 04, 2004 1:56 pm   Post subject: (No subject)

Yeah, I got it. MBB (Magic bulletin board).

I forgot to switch the inequality sign when I multiplied. The summer has been too long already
Martin




PostPosted: Wed Aug 04, 2004 1:56 pm   Post subject: (No subject)

Now here's a strange one....

For f(x) = x^2 +kx +k, determine all values of k such that f(x) > 0
AsianSensation




PostPosted: Wed Aug 04, 2004 2:06 pm   Post subject: (No subject)

I think it's 4 > k > 0
Martin




PostPosted: Wed Aug 04, 2004 2:18 pm   Post subject: (No subject)

How do you get that?
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Martin




PostPosted: Wed Aug 04, 2004 2:20 pm   Post subject: (No subject)

I got the x < 4 by setting the equation to having two equal roots. Now, how do I check to see if an equation has no real roots?

EDIT: Nevermind. Quadratic equation. MBB. w00t.
Maverick




PostPosted: Wed Aug 04, 2004 3:24 pm   Post subject: (No subject)

I have a question. Why are u doing math in the summer?
Martin




PostPosted: Wed Aug 04, 2004 3:33 pm   Post subject: (No subject)

I like math. And I didn't do any math during highschool, so I figured that, seeing as I'm going for a math degree from waterloo, now would be a good time to start.
Maverick




PostPosted: Wed Aug 04, 2004 3:38 pm   Post subject: (No subject)

lol ur going for a math degree when u never took math in HS????
Genesis




PostPosted: Wed Aug 04, 2004 8:13 pm   Post subject: (No subject)

I think he meant that he didn't do any work in math during highschool. Like me. It's easy to get good math marks without really doing the homework/assignments.
Martin




PostPosted: Wed Aug 04, 2004 11:46 pm   Post subject: (No subject)

Good call Genesis Wink
Martin




PostPosted: Fri Aug 06, 2004 10:53 pm   Post subject: (No subject)

Okay, here comes the next question:

If the roots of the equation x^3 -15x^2 +cx -105 = 0 are a - b, a, and a + b, determine a, b, and c.
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