Maths: Functions
Hi I'm doing a maths past paper but I'm really struggling with a question, I'd really appreciate anyone's help. Thanks
17. f=3/(x+1) + 1/(x-2)
a) State one value of x which cannot be included in any domain of f.
b) Find the value of f(0) - (think I've done that one though)
c) Find the value of x for which f(x) =0. Show clear algebraic working.
If you answer them please could you put the working out so I know how to do it in the future? Thank you!
17. f=3/(x+1) + 1/(x-2)
a) State one value of x which cannot be included in any domain of f.
b) Find the value of f(0) - (think I've done that one though)
c) Find the value of x for which f(x) =0. Show clear algebraic working.
If you answer them please could you put the working out so I know how to do it in the future? Thank you!
Original post by Lennie14!
Hi I'm doing a maths past paper but I'm really struggling with a question, I'd really appreciate anyone's help. Thanks
17. f=3/(x+1) + 1/(x-2)
a) State one value of x which cannot be included in any domain of f.
b) Find the value of f(0) - (think I've done that one though)
c) Find the value of x for which f(x) =0. Show clear algebraic working.
If you answer them please could you put the working out so I know how to do it in the future? Thank you!
17. f=3/(x+1) + 1/(x-2)
a) State one value of x which cannot be included in any domain of f.
b) Find the value of f(0) - (think I've done that one though)
c) Find the value of x for which f(x) =0. Show clear algebraic working.
If you answer them please could you put the working out so I know how to do it in the future? Thank you!
For A the only thing i can think of is this,
remember that any number/0 can't work? Well that can apply here.
Spoiler
For C put f= to 0 then cross multiply and solve like a normal algebraic problem
Spoiler
(edited 8 years ago)
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