Created by Tech Wilkinson
almost 10 years ago


Question  Answer 
discriminant  \(b^24ac\) 
equation of straight line through \((x_1,y_1)\) with gradient \(m\)  \(yy_1 = m(xx_1)\) 
perpendicular straight lines with gradients \(m_1\) and \(m_2\)  \(m_1 m_2 = 1\) 
equation of circle with centre \((a,b)\) and radius \(r\)  \((xa)^2+(yb)^2=r^2\) 
differentiation of \(y=x^n\)  \(\frac{dy}{dx}=nx^{n1}\) 
differentiation of \(y=f(x)+g(x)\)  \(\frac{dy}{dx}=f'(x)+g'(x)\) 
Min / Max / Point of inflection (2nd derivative)  \(\frac{d^2y}{dx^2} = 0\) 
Minimum point (2nd derivative)  \(\frac{d^2y}{dx^2} > 0\) 
Maximum point (2nd derivative)  \(\frac{d^2y}{dx^2} < 0\) 
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