Relations and Functions
NCERT Class 12
CBSE
Grade 12
Question:
If $f(x) = \dfrac{x + 1}{x - 1}$, $x
eq 1$, find $(f \circ f \circ f)(x)$.
Step-by-Step Solution
$(f \circ f)(x) = \dfrac{2x}{2} = x$. [1.5 Marks]
$(f \circ f \circ f)(x) = f(x) = \dfrac{x + 1}{x - 1}$. [1.5 Marks]
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🎯 Official CBSE Marking Scheme:
Evaluating $(f \circ f)(x) = x$: 1.5 Marks
Evaluating $(f \circ f \circ f)(x) = (x+1)/(x-1)$: 1.5 Marks
Correct Answer:
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