MATH 1XX3 Lecture Notes - Lecture 26: At4
17 Mar 2016
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To dale we have learned about functions in one variable : f ( x ) = sink ) + bn ( x ) t 3 xet. Some set d bi f of 2 variables a unique a rule is real number that assigns to each pair denoted ffxy ) , y ) is fcx , y ) We can plug in any coordinate it x , g on the line or above. Range :[ 0: ) we can get any value greater than zero. Example : what is the domain and range of flx ,y72txty. Domain : all x , y such that 25 - x. Y2z0(cid:12200)> 252 2+6 ie anything in the circle 25 = x2+y2. #% yxinfonniheaoifnne or of the circle within it. The largest number we can have is 5 because can have the smallest number we that is the center of the circle can"t have negative numbers x50,0 )
