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Higher Maths 2000 - Paper I - Q2 (c) - HSN forum

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Higher Maths 2000 - Paper I - Q2 (c)


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#1 aldo

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Posted 21 April 2005 - 05:45 PM

Hi,

Was wondering if anyone could help me with the following question:

Higher Maths 2000 - Paper I - Q2 ( c )

Unsure how to do this, so any help would be much appreciated...

Thanks.

#2 George

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Posted 21 April 2005 - 06:52 PM

I think the way to do it is visualise the line y = k (ie parallel to the x-axis). It will intersect the curve in 3 places if k is between the y-values of the two turning points.

On the graph of f(x), this would be 0 < k < 4. Since g(x) is shifted up 4, the range for k is 4 < k < 8.

#3 aldo

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Posted 21 April 2005 - 07:52 PM

Yeh, I see that now! Cheers.





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