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Functions C3?

JodieW

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For part a) could someone help me understand how to find the domain? Thanks :smile:

I have x/2 as the inverse function.

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Reply 1

Lunch_Box

Original post by JodieW

For part a) could someone help me understand how to find the domain? Thanks :smile:

I have x/2 as the inverse function.

Posted from TSR Mobile

The domain is the range of the original function.

What values of f(x) can you get out, given that you're allowed to put in whatever value of x you like?

Reply 2

JodieW

Original post by Lunch_Box

The domain is the range of the original function.

What values of f(x) can you get out, given that you're allowed to put in whatever value of x you like?

Is it x>0?

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Reply 3

JodieW

And for c) is it x is more than or equal to 2?

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Reply 4

Lunch_Box

Original post by JodieW

Is it x>0?

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No. The domain of f(x) is any real number. Therefore you can get an output of anything as well, since you're just doubling the input. So f(x) is any real number.

Reply 5

JodieW

Original post by Lunch_Box

No. The domain of f(x) is any real number. Therefore you can get an output of anything as well, since you're just doubling the input. So f(x) is any real number.

Thanks! And for c) is it x is more than or equal to 2?

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Reply 6

JodieW

Original post by Lunch_Box

No. The domain of f(x) is any real number. Therefore you can get an output of anything as well, since you're just doubling the input. So f(x) is any real number.