ncert books for class maths cbsc

® For a function f and a real number a , lim → f ( x ) and f ( a ) may not be same (In fact, one may be defined and not the other one). ® For functions f and g the following holds: ] ( ). ( ) ( ).lim f x g x f x g x lim ( ) f x f x g x g x  =     ® Following are some of the standard limits na LIMITS AND DERIVATIVES sin cos ® The derivative of a function f at a is defined by ( ) lim f a f a f ′ ® Derivative of a function f at any point x is defined by df x f x f x f dx ′