, its
derivative f ′exists at each point of I, then a natural question
arises that given f ′at each point of I, can we determine
the function The functions that could possibly have given
function as a derivative are called anti derivatives (or
primitive) of the function Further, the formula that gives
all these anti derivatives is called the indefinite integral of the function and such
process of finding anti derivatives is called integration Such type of problems arise in
many practical situations