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प्रश्न
Check if the relation given by the equation represents y as function of x:
x + y2 = 9
उत्तर
x + y2 = 9
∴ y2 = 9 – x
∴ y = `± sqrt(9 - x)`
∴ for every value of x, there are two values of y.
∴ y is not a function of x.
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