HSC Stuff > HSC Mathematics Extension 1

Polynomial Question

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r1ckworthy:

--- Quote from: pariselle.hughes on June 02, 2019, 09:53:21 pm ---Heyyyy peeps... can someone please help me with this question. (First post.. so not sure where exactly to post it :))
'for what real values of 'k' does the equation x^3-2x^2-4x+k = 0 has at least one root strictly between -2 and 0??'

Thanks awesome humans!!

--- End quote ---

Hey!!! Here is my solution of the question:


BTW that cross between the f(-2) and f(0) towards the end is just multiplying the two functions together.
Yeah, like S200 mentioned, just post on the 3U Maths Question Thread anytime you have a question, so it's much more cleaner in terms of organisation, and others can also see and learn from your question ;D ;D ;D

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