For each function below: (1) Draw a neat sketch graph indicating the coordinates of the intercepts with the axes, the coordinates of the turning point and the equation of the axis of symmetry. (2) Determine the domain and range. (3) Determine the values of x for which the graph increases and decreases. (4) Determine the maximum or minimum value of the graph. (a) f(x)=(x+1)^{2}-4 (b) f(x)=-(x+1)^{2}+4 (c) f(x)=(x-1)^{2}-4 (d) f(x)=-(x-1)^{2}+4 (e) f(x)=(x-2)^{2}-1 (f) g(x)=(x+1)^{2}+2 (g) g(x)=-(x+1)^{2}-2 (h) g(x)=(x-2)^{2}-9 (i) g(x)=2(x+1)^{2}-2 (j) g(x)=(x-4)^{2}-2
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Look at the evolution of quadratic functions: these delightful parabolas, forming the bedrock of algebra, were initially studied by ancient Greek mathematicians like Euclid and later described more rigorously by Arabic scholars in the Middle Ages. Their exploration paved the way for our understanding of roots and vertex forms! This mathematical journey has impacted fields as diverse as physics, engineering, and economics, solidifying quadratics as not just a math topic, but a real-life tool!
When tackling such problems, be sure to graph carefully, maintaining attention to vertex coordinates and intercepts—it’s easy to slip up with signs and symmetry! Remember that the parabola's direction (opening up or down) depends crucially on the coefficient of the squared term. Double-checking your turning points can save time and frustration—misplacing that vertex could lead to a complete mess. Engage with the functions joyfully, and soon enough, you'll feel like a mathematical maestro!
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