I have a few different math problems i need help with

1. Find the domain of the function 6(square sign)x (square sign end)-12

2. Let f(x)= 18 calculate the following values

f(a+h)

f(a+h)-f(a) Over h

So how would you do those?

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- Jan 31st 2008, 06:03 PMGirlaaaaaaaaAlgerbra help
I have a few different math problems i need help with

1. Find the domain of the function 6(square sign)x (square sign end)-12

2. Let f(x)= 18 calculate the following values

f(a+h)

f(a+h)-f(a) Over h

So how would you do those? - Jan 31st 2008, 06:13 PMbadgerigarQuote:

1. Find the domain of the function 6(square sign)x (square sign end)-12

The domain is the set of possible values for x. \sqrt{x} doesn't work for negative numbers so the domain is $\displaystyle [0,\infty)$

Quote:

2. Let f(x)= 18 calculate the following values

f(a+h)

f(a+h)-f(a) Over h

To find f(a+h) we replace all the xs with a+h.

so f(a+h) = 18

the same process gives us f(a) = 18, so $\displaystyle \frac {f (a+h)-f (a)}{h} = 0$