MATH 211 Midterm: MATH 211 NIU 09Spring
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You should use your graphing calculator on problem 15. For the other problems, you should use your calculator only to check your answers. (6 pts. ) Find the slope of the line passing through the two points ( 1, 7) and (4, 3). 2x + 1 x 1 x 2 (12 pts. ) Factor completely. (a) 8x3y4 4x4y2 (b) 8x3 50x. Find the domain of f (x) = (7 pts. ) The two points ( 4, 2) and (2, 6) are the endpoints of a diameter of a circle. Find an equation for this circle. (7 pts. ) Factor x2 + 2x 24. (5 pts. ) 3x 3 x2 + 2x x2 1 x2 + 4x + 4 (8 pts. ) 15. (a) use your calculator to graph y = x3 + 3x2 + 5 using the window. 4 x 2 and 5 y 15. (b) use your calculator to nd the x-intercept (the point where y = 0).
