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OpenStudy (anonymous):
prove that the function y=(x^4 - x^3 + x^2-x-2)/(x^2+x+1) crosses the x-axis somewhere between -1 and 1
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OpenStudy (zarkon):
show y(x) is continuous between -1 and 1 find the value of y for x=-1 and x=1 then use the intermediate value theorem
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