MCQ
$f(x) = \frac{{{x^2} + 34x - 71}}{{{x^2} + 2x - 7}}$ નો વિસ્તાર મેળવો.
- A$[5, 9]$
- ✓$( - \infty ,\;5] \cup [9,\;\infty )$
- C$(5, 9)$
- Dએકપણ નહી.
$ \Rightarrow \,\,{x^2}(1 - y) + 2\,(17 - y)\,x + (7y - 71) = 0$
For real value of $x,\,\,{B^2} - 4AC \ge 0$
$ \Rightarrow \,\,{y^2} - 14y + 45 \ge 0\,\, \Rightarrow y \ge 9,\,\,y \le 5$ .
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(અહીં $\left.\left(\begin{array}{l} n \\ k \end{array}\right)={ }^{ n } C _{ k }\right)$