If you can help that would be great!

The Function is f (x) = sqrt( 8x + 8 )

Then (f) is in the domain of (x) provided xor equal to ??????????

Question

If you can help that would be great!

The Function is f (x) = sqrt( 8x + 8 )

Then (f) is in the domain of (x) provided x>or equal to ??????????

amistre64 · Answer

can you rewrite the problem?  the way it is in the ....book Im assuming....

amistre64 · Answer

if anything, I would assume that it is asking for the domain of f(x).. but I am unclear with what you write here.

amistre64 · Answer

if so, the sqrt function can only have values equal to or greater then zero in it, any "x" that you use will have to be limited to values that make the expression equatl to or greater than 0.

anonymous · Answer

yes its the domain of f(x) sorry

amistre64 · Answer

..then we can figure out the bad "x" values by doing this:

8x +8 >=0

8x >= -8

x>= -8/8

x>= -1

the domain for f(x) is then; all values of x that are greater than or equal to -1.  or written in notation:  [-1,inf)

amistre64 · Answer

or rather, the "good" x values....

anonymous · Answer

ok thanks that makes sense!