User talk:Mahmoudshaker012

1.     A. The area  of parabolic section if the equation  of parabola is : 〖y=ax〗^2+bx+c Equal  a/(6  )   (∆x)^3 Where a is the co-efficient of 〖ax〗^2,∆x=x2-x1 where x2,x1 points of intersection. B. The area of parabolic section, if the equation of parabola is: x=ay^2+by+c  Equal  a/(6  )(∆y)^3 As mentioned above. 2. The aria of 1 piece of the cubic curve which its equation is                    y=〖ax〗^3+ 〖bx〗^(2 )+ cx+d Equal a/4  (∆x)^3 (x2+x1)+b/6  (∆x)^3 Where ∆x=x2-x1 . In 2010 also in 2013 Engineer mahmoud shaker discovered the  rules mentioned above 1and 2 successively.