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Question: hi there i can do q2 if i draw...

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Hi there - i can do q2 if I draw the graphs and see where they intersect but would love to see your working for both q2 and q3 - with q3 i got super close I think... thanks heaps

I ended up with  k<±23 +8but i don't think that quite works for the answer which is (b) 

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