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C3 jan 2006 q4

i don't understand part iii, I'm not sure what it's asking me and how to do it. It's probably something simple because it's two marks.:frown:
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Reply 1
Avatar for TeeEm
TeeEm
19
Original post by Christina Tiana
i don't understand part iii, I'm not sure what it's asking me and how to do it. It's probably something simple because it's two marks.:frown:


find f(4)
get answer
do f(answer)
Reply 2
Avatar for davros
davros
16
Original post by Christina Tiana
i don't understand part iii, I'm not sure what it's asking me and how to do it. It's probably something simple because it's two marks.:frown:


Can you draw the graph of |f(x)|?

Draw a horizontal line representing y = k on the graph.

In what circumstances can you have 2 intersections?
Reply 3
Avatar for hajs
hajs
11
Original post by TeeEm
find f(4)
get answer
do f(answer)


Isn't OP stuck on ii?
Draw the modulus graph and draw line y=k and find the possible intersection points.
Reply 5
Avatar for TeeEm
TeeEm
19
Original post by hajs
Isn't OP stuck on ii?


possibly ...

I am an old fool so I am sure my comment will be ignored

:frown:
Thank you! I understand now that I've drawn the graph, but theres two marks for this, one for method, I can't see any method for this question other than drawing the graph?

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