# For which pairs of numbers (x.y) is the function given below defined?

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#(x^2+y^2)^(1/2) + (x^2+y^2-1)^(1/2)#

##### 1 Answer

Mar 4, 2018

for

#### Explanation:

since we cannot take a square root of a negative number or raise it to a half power (unless using complex mathematics),

therefore, this function will be defined for all