WBJEE · Maths · Functions
Let \(R\) be the set of real numbers and the mapping \(f: R \rightarrow R\) and \(g: R \rightarrow R\) be defined by \(f(x)=5-x^2\) and \(g(x)=3 x-4\), then the value of \((f \circ g)(-1)\) is
- A -44
- B -54
- C -32
- D -64
Answer & Solution
Correct Answer
(A) -44
Step-by-step Solution
Detailed explanation
Hints: \(\mathrm{f}(\mathrm{g}(-1))=\mathrm{f}(-3-4)=\mathrm{f}(-7)=5-49=-44\)
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