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-- Mathematics - Section B1
Relations and Functions
If a function f(x) is defined for $x∈[0, 1]$, then the function $f(x^2)$ is defined for
$x ∈ [0, 1]$
$x∈[−1, 1]$
$x ∈ R$
$x ∈\left[-\frac{3}{2},1\right]$
$0 ≤ x^2 ≤1 ⇒ -1 ≤ x ≤ 1$