You can use GeoGebra to find the derivative of a function: 
     GeoGebra Instruction 1
CAS CAS     under         View     in         Menu.         CAS     and         click         the         Derivative 
      
     GeoGebra Instruction 2
Algebra View In GeoGebra, there are several commands available for differentiation in Algebra View. You can use Derivative(<Expression>) and   Derivative(<Expression>, <Variable>, <Number>). 
Derivative<Expression>)     is         used         to         differentiate         a         function         normally.         
Derivative(<Expression>,     <Variable>,     <Number>))     is         used         to         differentiate         a         multivariate         function,         and/or         differentiate         a         function         multiple         times.         For         instance,         if         you         want         to         differentiate         a         function         three         times         with         respect         to         ,         you         type         Derivative(<Expression>,     x_2,     3).