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2007 Paper 1 Q9(a) - HSN forum

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2007 Paper 1 Q9(a)


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#1 Ron90

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Posted 19 May 2008 - 02:26 PM

f(x) = 3x - x^3

(a) Find the exact values where the graph of y = f(x) meets the x- and y-axes.

Ive found where it crosses the y-axis by making the x = 0 and got it as (0,0) which is correct.

However how do u find where it meets the x-axis? (apart from 0,0)



#2 Marcus

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Posted 19 May 2008 - 02:28 PM

to find where it meets the x-axis you let f(x)=0 then factorise and solve
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