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# A2 Edexcel C3 Solomon help

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1. Hello, does anyone know the general method to answer answer question 4 part a?
Thanks
https://b3755649dbd1afe3db91a899c3b9...%20Edexcel.pdf
2. (Original post by Grewsters)
Hello, does anyone know the general method to answer answer question 4 part a?
Thanks
https://b3755649dbd1afe3db91a899c3b9...%20Edexcel.pdf
Mod f(x) takes positive values and returns the same positive values - it takes negative values and multiplies them by -1, in effect.

(The real definition is mod(f(x)) = max(f(x), -f(x))).

So just sketch the graph and reflect any negative regions in the x axis.
3. (Original post by SeanFM)
Mod f(x) takes positive values and returns the same positive values - it takes negative values and multiplies them by -1, in effect.

(The real definition is mod(f(x)) = max(f(x), -f(x))).

So just sketch the graph and reflect any negative regions in the x axis.
Whoops sorry I meant part b
Thanks though
4. (Original post by Grewsters)
Whoops sorry I meant part b
Thanks though
You've got two sets of co-ordinates given so you can form simultaneous equations.
5. (Original post by SeanFM)
You've got two sets of co-ordinates given so you can form simultaneous equations.
Ahhh ok thank you!

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