159E2-F2010

# 159E2-F2010 - MA 15900 EXAM 2 FALL 2010 1 Find an equation...

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MA 15900 EXAM 2 FALL 2010 1 1. Find an equation of the line that passes through the point A (2, 5) and is perpendicular to the line 4 x + 7 y = 8 . 1) y = 4 7 x 27 7 2) y = 7 4 x + 43 4 3) y = 4 7 x 43 7 4) y = 4 7 x + 8 7 5) y = 7 4 x + 8 7 6) y = 4 7 x + 8 7 7) y = 4 7 x 6 7 8) y = 7 4 x 34 4 9) y = 4 7 x + 34 7 2. Find an equation of the circle that has endpoints of a diameter at (1, 2) and (7, 10). 1) ( x 8) 2 + ( y 3) 2 = 50 2) ( x 8) 2 + ( y 3) 2 = 50 3) ( x 1) 2 + ( y 2) 2 = 100 4) ( x 2 + ( y 2) 2 = 10 5) x 2 + ( y 9) 2 = 50 6) x 2 + ( y 9) 2 = 50 7) ( x 4) 2 + ( y 6) 2 = 25 8) ( x 4) 2 + ( y 6) 2 = 5 9) None of the above 3. Find the standard equation of the parabola that has a vertical axis, vertex(2, – 5), and an x -intercept when x = 4. 1) y = 5 4 ( x 2) 2 5 2) y = 4 5 ( x 2) 2 5 3) y = 9 4 ( x 2) 2 5 4) y = 4 9 ( x 2) 2 5 5) y = 5 2 ( x 2) 2 5 6) y = 2 5 ( x 2) 2 5 7) y = 9 2 ( x 2) 2 5 8) y = 2 9 ( x 2) 2 5 9) None of the above

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MA 15900 EXAM 2 FALL 2010 2 4. Given y = x 3 x , which of the following pairs of functions gives an equivalent composite form for y, where y = ( f g )( x ) ? 1) f ( x ) = x g ( x ) = x 3 x 2) f ( x ) = x 3 x g ( x ) = x 3) f ( x ) = x g ( x ) = x 9 x 4) f ( x ) = x 9 x g ( x ) = x 5) f ( x ) = x g ( x ) = 1 3 x 6) f ( x ) = 1 3 x g ( x ) = x 7) f ( x ) = 3 + x g ( x ) = x 9 x 8) f ( x ) = x 9 x g ( x ) = 3 + x 9) None of the above 5. If f ( x ) = 2 x 5 x , find f ( 9 4 ) .
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159E2-F2010 - MA 15900 EXAM 2 FALL 2010 1 Find an equation...

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