The zero of F-1(x) in F(x) = x + 3 is

A.) -3
B.) 0
C.) 3

Question

The zero of F-1(x) in F(x) = x + 3 is


A.) -3
B.)  0
C.) 3

mathslover · Answer

x+3 = 0 , x=-3

is this what we have to do @hartnn ?

hartnn · Answer

zero of F-1(x) means to equate F-1(x) =0
so what is F(0) = ?
just put x=0 in F(x)

anonymous · Answer

Can you please work it out without giving the answer? Im still a bit confused.

hartnn · Answer

ok,
to get zeros of F-1(x)
Equating F-1(x) =0
so,  F(0) = 0+3 (put x=0 in F(x))
              = ?
hence  zeros of F-1 (x) = ?

anonymous · Answer

3

hartnn · Answer

yup

anonymous · Answer

Thanks, I think I get it now!!

hartnn · Answer

welcome ^_^
you can also actually calculate F-1 (x) (let it be y)
y=x+3
interchange x and y
x=y+3
y=x-3
s0 F-1(x) = x-3
to get zeros, put F-1(x)=0
x-3=0
x=3

anonymous · Answer

Ok thanks...this way seems easier!!!