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# C3 domain Watch

1. https://07a69ccf283966549a9350d1a669...%20Edexcel.pdf

Question 8a. I get that I have to work out the range of the function first in order to get the domain of the inverse.

How would I find the range? I draw it out and the y cooerdinate is (0,1) but range seems to be < 3??
2. (Original post by imran_)
https://07a69ccf283966549a9350d1a669...%20Edexcel.pdf

Question 8a. I get that I have to work out the range of the function first in order to get the domain of the inverse.

How would I find the range? I draw it out and the y cooerdinate is (0,1) but range seems to be < 3??
draw out the f(x) graph and you will see there is an assymptote at y=3, hence the range of f(x) is f(x) < 3

we can then deduce the domain of the inverse function from this
3. (Original post by Katiee224)
draw out the f(x) graph and you will see there is an assymptote at y=3, hence the range of f(x) is f(x) < 3

we can then deduce the domain of the inverse function from this
i did draw it several times im still getting wrong? mind showing me a worked solution
4. (Original post by imran_)
i did draw it several times im still getting wrong? mind showing me a worked solution
does this help
Attached Images

5. (Original post by Katiee224)
does this help
i got the same shape but the Y cooerdiante is 1?
6. (Original post by imran_)
i got the same shape but the Y cooerdiante is 1?
yes that's right, it crosses the y axis at 1 and the x axis at -1

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