Differentiation (1 Viewer)

[.ben]

Hey guys hwen u differentiate, which derivative do you use to find concave up or down and which do u use to find increasing or decreasing function? thnx

 

[Riviet]

* First derivative for determining increasing/decreasing at a point {f'(a)>0 means increasing at x=a and f'(a)<0 means decreasing at x=a}
* Second derivative for finding concave up/down {f''(a)>0 means concave UP at x=a, f''(a)<0 means concave DOWN at x=a}

 

[muttiah]

yep the above person is right... if u wanted a 2nd opinion...