Is even function always symmetric about Y-axis? Why? Is y = f (x + 8) even function, and is the graph drawn symmetric about Y-axis?
Yes, because the definition of even function is: the domain of definition is symmetric about the origin, and f (- x) = f (x)
Obviously, f (x) is symmetric about the Y axis
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- 14. If the area of the triangle formed by the image of the first-order function y = - 2x + B and the two coordinate axes is 9, then B=______ .
- 15. If the area of the triangle formed by the line y = 2x + B and the coordinate axis is 6, then the analytic expression of the function of the line is
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- 20. The area of the triangle formed by the line y = KX + 3 and the two coordinate axes is 9, and the value of K is obtained