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Conferences The CTK Exchange High school Topic #404
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abhi

guest

Feb-20-11, 07:41 AM (EST)

"inequation"

hi,

would anyone kindly suggest a method for solving this inequation?

Find all real numbers such that:

x^4-3x^3-x^2-x-2 is less than or equal to 0.

any hint will be appreciated

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alexb
Charter Member
2772 posts

Feb-22-11, 08:32 AM (EST)

1. "RE: inequation"
In response to message #0

Wolfram alpha tells us that the polynomial x^4-3x^3-x^2-x-2 has two real roots: (approximately) -0.785041 and 3.42669

Between this two roots the polynomial is negative. Outside the roots it is positive.

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abhi

guest

Feb-25-11, 09:33 AM (EST)

2. "RE: inequation"
In response to message #1

thank you very much, alexb

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