Question

The function ff defined by f(x)= \frac{ax+b}{cx+d}f(x)= cx+d ax+b ​ , where aa,bb,cc and dd are nonzero real numbers, has the properties f(19)=19f(19)=19, f(97)=97f(97)=97 and f(f(x))=xf(f(x))=x for all values except \frac{-d}{c} c −d ​ . Find the unique number that is not in the range of f. you can get 100 points if i mark you the brainliest

Answer 1

Step-by-step explanation:

The function ff defined by f(x)= \frac{ax+b}{cx+d}f(x)= cx+d ax+b , where aa,bb,cc and dd are nonzero real numbers, has the properties f(19)=19f(19)=19, f(97)=97f(97)=97 and f(f(x))=xf(f(x))=x for all values except \frac{-d}{c} c −d . Find the unique number that is not in the range of f.

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