Question

Why is f not a function from R to R if
a) f(x)=1/x ?
f(x) is not well-defined because there are two distinct values assigned to each x.
f(0) is not defined.
f(x) is not defined for x<0.

Answer 1

i have a done just need help with b

Answer 2

@Jhannybean help me with b please

Answer 3

(a) was f(0) not well defined

Answer 4

what do you think the answer is.

Answer 5

f(0) is not defined because you cannot divide by 0. That is right.

Answer 6

i thinking that b is f(x) not well define x<0

Answer 7

You are right.

Answer 8

ok thanks for the checking

Answer 9

no problem :)