Question

I don't really understand how to get the answer to this question, my guess is the square root of 2, but I'm not sure. Please help.
If f(x)=1-x, which value is equivalent to the absolute value of f(i)? Possible answers: 0, 1, sqrt of 2, or sqrt of -1.

Answer 1

@GodGirl360 what is i here?

Answer 2

i is sqrt of -1.

Answer 3

ok.. so f(i)=1-i there fire |f(i)|=sq root(1^2+(-1)^2)=sq root 2

Answer 4

@GodGirl360

Answer 5

Ok, so my first guess was right?

Answer 6

formula |a+ib|=square root(a^2+b^2).

Answer 7

where a and b are real numbers.

Answer 8

@GodGirl360

Answer 9

yes it is right but there is no place of guess in maths.:)

Answer 10

Ok, thank you so much.:)