Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 2024-03-10 01:26:01

mathxyz
Member
From: Brooklyn, NY
Registered: 2024-02-24
Posts: 782

Find Values of A and B

If f(x) = (x - B)/(x - A), f(2) = 0 and f(-1) is undefined, what are the Values of A amd B?


The greatest truth about the Rapture is not its timing but it's reality.

Dr. David Jeremiah

Offline

#2 2024-03-10 01:33:12

Bob
Administrator
Registered: 2010-06-20
Posts: 10,319

Re: Find Values of A and B

Put x=-1 in x-A = 0 to get A.

Put x = 2 in x-B = 0 to get B.

Bob


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob smile

Offline

#3 2024-03-10 11:46:08

mathxyz
Member
From: Brooklyn, NY
Registered: 2024-02-24
Posts: 782

Re: Find Values of A and B

Bob wrote:

Put x=-1 in x-A = 0 to get A.

Put x = 2 in x-B = 0 to get B.

Bob

Thanks. I will solve it later on my lunch break at the job. It will give me something to do.


The greatest truth about the Rapture is not its timing but it's reality.

Dr. David Jeremiah

Offline

#4 2024-03-10 17:48:45

mathxyz
Member
From: Brooklyn, NY
Registered: 2024-02-24
Posts: 782

Re: Find Values of A and B

Bob wrote:

Put x=-1 in x-A = 0 to get A.

Put x = 2 in x-B = 0 to get B.

Bob

x - A = 0

-1 - A = 0

-A = 1

A = 1/-1

A = -1

x - B = 0

2 - B = 0


-B = -2

B = -2/-1

B = 2

Yes?


The greatest truth about the Rapture is not its timing but it's reality.

Dr. David Jeremiah

Offline

#5 2024-03-10 20:49:56

Bob
Administrator
Registered: 2010-06-20
Posts: 10,319

Re: Find Values of A and B

Correct.
B


Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob smile

Offline

#6 2024-03-11 01:46:38

mathxyz
Member
From: Brooklyn, NY
Registered: 2024-02-24
Posts: 782

Re: Find Values of A and B

Bob wrote:

Correct.
B

The question itself looks tricky but it's actually easy as pie.

Last edited by mathxyz (2024-03-11 01:47:10)


The greatest truth about the Rapture is not its timing but it's reality.

Dr. David Jeremiah

Offline

Board footer

Powered by FluxBB