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MODULE 3 EXERCISES-MATH 121

# MODULE 3 EXERCISES-MATH 121 - Jimmy Morgan-MAT-121-OL(1 Nov...

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Jimmy Morgan-MAT-121-OL-(1 Nov 09 thru 23 Jan 20100-MODULE 3 EXERCISES 2.1 (16) For the points and Q, find (a) the distance d(P,Q) and (b) the coordinates of the midpoint of the segment PQ. d= (P,Q) ( 29 ( 29 6, 2 , 4,6 P Q -   m = 6 4 -2 6 , 2 2 + + ÷ = [ ] ( 29 ( 29 2 2 4 6 6 2 - + - - = 10 4 5, 2 2 2 = = =   = 4 64 + = { } 5,2 = 68 = 2 17 2.2 (20) Decide whether or not each equation has a circle as its graph. If it does, give the center and the radius. If it does not, describe the graph. 2 2 8 6 16 0 x y x y + + - + = ( 29 ( 29 2 2 8 6 16 x x y y + + - = -       ( 29 ( 29 ( 29 ( 29 2 2 2 2 1 1 8 4 16 6 3 9 2 2 and = = - = - =       ( 29 ( 29 2 2 8 16 6 9 16 16 9 x x y y + + + - + = - + + ( 29 ( 29 2 2 4 3 9; 4 3 x y x or x + + - = = - =       Since 9 0, > the equation represents a circle with center at (-4, 3) and a radius of 3. 2.3 (20)

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MODULE 3 EXERCISES-MATH 121 - Jimmy Morgan-MAT-121-OL(1 Nov...

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