All solutions to Ex 10.1, 10.2 and 10.3 have now been posted on the blog.

# Chapter 10 Functions, Graphs and Modelling

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All solutions to Ex 10.1, 10.2 and 10.3 have now been posted on the blog.

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Hellllooooo…

Yes, I’m not in your class but I’m still using your thinga ma jig MUHAHAHAHA.

In question 12 of 1.3 your little <‘s turn around sometimes but not other times. What makes them change?

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AND… in question 14. Why IS the negative answer acceptable?

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nevermind last bit i figuired it out

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Thankyou! And I swear I’ve had this captcha before…

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In answer to your questions Haley, for Quest 12 you need to look at the required conditions. For example, for 3^x>9 the solution is x>2 ie any values of x over 2 will give an overall result of over 9 as required. So that answer is obviously one that has the > not “turned around” as you put it. However, what about 3^(-x)>9? Now for 3^(-x)=9 the solution is x=-2. What result would values of x>-2 give now? This solution would give us answers 9 as required. So we “turn around” the when we see the needed result. In this case the solution to 3^(-x)>9? is x<-2.

In Question 14 e, the answer can be negative as it is not log(negative number).

Hope that helps! ðŸ™‚

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Captcha Cassie?

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