Class 12 Relations And Functions · Mcq Single Correct1 Markstypes_of_functions
Class 12 Maths · Relations And Functions · Mcq Single Correct #75
Let \(f:[2,\infty)\to\mathbb R\) be defined by \(f(x)=x^2-4x+5\). Its range is
✅ Step-by-Step Solution
Final Answer: Option (B): \([1,\infty)\)
- Complete the square: f(x)=(x-2)^2+1. On x>=2 the square attains every nonnegative value, giving range [1,infinity).
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