Question 79
Non-zero real numbers $a$ and $b$ satisfy $\frac{a}{b+1} + \frac{b}{a+1} = 1$. Which of the statements about the expression $\frac{a}{b} + \frac{b}{a} - \frac{1}{ab}$ is correct?
(A) The expression can take any value in the interval $(0, 1]$.
(B) The expression can take any value in the interval $[1, 2)$.
(C) The value of the expression is 1.
(D) The value of the expression is 2.
(E) We cannot say anything about the value of the expression.
(A) The expression can take any value in the interval $(0, 1]$.
(B) The expression can take any value in the interval $[1, 2)$.
(C) The value of the expression is 1.
(D) The value of the expression is 2.
(E) We cannot say anything about the value of the expression.