A function of the form f(x) = ax + b is called an identity function when?
- a = 1, b = 0
- a = 0, b = 1
- a = 1, b = 1
- None of these
Explanation
The identity function is defined as f(x) = x.
Comparing f(x) = ax + b with f(x) = x gives a = 1 and b = 0.
Therefore, the correct condition is a = 1, b = 0.
Last verified on 14-11-2026
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