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St. Line Graph

Straight line graphs. The graph of each of  equations is a straight line: If an equation can be rearranged into the form y = mx +c, then its graph will be a straight line. ax +by= c  can be rearranged as (which can be re-written as  y = mx+c). Therefore vertical lines have equations have slope undefined form x =k . Hence graph depend on […]

Area Under the Curve

This post about Area under a Curve. The area between the graph of y = f ( x ) and the x -axis is given by the definite integral. This formula gives a positive result for a graph above the x -axis, and a negative result for a graph below the x -axis. Because of  enclosed region by limit.  Hence , we use definite integration. Similarly for volume […]

Maxima and Minima

Maximum and minimum of Points of Inflection. The value f ‘(x) is the gradient at any point but often we want to find the Turning or Stationary Point (Maximum and Minimum points) or Point of Inflection These happen where the gradient is zero, f ‘(x) = 0. Critical Points include Turning points and Points where f ‘ (x) does […]

Equation of Tangent and Normal

Tangents to a curve are a line that touches the curve at one point and has the same slope as the curve at that point. A normal to a curve is a line perpendicular to a tangent to the curve. Tangent and Normal

 
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