Question

Is g(f(-7)) defined? Why or why not?

Answer 1

That depends on what f(x) and g(x) are.

Answer 2

oh well f(x)=\[3x+7\]
g(x)=\[2\sqrt{x-3}\]

Answer 3

@geerky42

Answer 4

First, let find just f(-7). Do you know how to do that?

Answer 5

ya I get that i just have no idea what "defined" means

Answer 6

f(-7)=-14

Answer 7

well, it's kind of ambiguous for your problem.

Something obvious like 1/0 or ∞ is undefined, basically something that is not number or cannot be calculated. Undefined things has no meaning. Imaginary number sometime can be considered undefined...

Is that clear?

Answer 8

so if its a real number it is defined

Answer 9

or a number that you can write

Answer 10

well, yeah basically. Real number is defined.

Answer 11

ok thank you very much sir or ma'm

Answer 12

sir. You are welcome!