Find domain of function f(x) = √9 – x2
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Domain and range
f(x)=9−x2
y=9−x2
9−x2≥0
9−x2≥0
x2≤9
x≤−+3
x∈[−3,3]
y2=9−x2
x2=9−y2
x=9−y2
9−y2≥0
y2≤9y∈3,−3
y=+ve
∵y∈[0,3]
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