When looking at the rational function f of x equals the quantity x minus one times the quantity x plus two times the quantity x plus four all divided by the quantity x plus one times the quantity x minus two times the quantity x minus four, Bella and Edward have two different thoughts. Bella says that the function is defined at x = - 1, x = 2, and x = 4. Edward says that the function is undefined at those x values. Who is correct? Justify your reasoning.

Question

Mathematics

Nigel Ho

17 August, 14:51

When looking at the rational function f of x equals the quantity x minus one times the quantity x plus two times the quantity x plus four all divided by the quantity x plus one times the quantity x minus two times the quantity x minus four, Bella and Edward have two different thoughts. Bella says that the function is defined at x = - 1, x = 2, and x = 4. Edward says that the function is undefined at those x values. Who is correct? Justify your reasoning.

+3

Answers (2)

Know the Answer?

Ulises Drake · Answer 1

The actual correct answer is Bella is correct, I put the equation into a system to solve it and those values came out as the discontinuous values.

Erin Bolton · Answer 2

F (x) = [ (x-1) (x+2) (x+4) ] / [ (x+1) (x-2) (x-4) ]

The function shows discontinuity at those values of x as the denominator becomes 0; therefore, Edward is correct.