let f be a nonnegative measurable function. then there is a sequence <pi n> of simple functiion with pi n+1>=pi n, such that f = lim pi n at each point of x. if f is defined on a sigma finite measure space. we may choose the function pi n so that each vanishes outside a set of a finite measure.
lim 𝑥→0+ (sin 𝑥) ^x
From a piece of wire 30 cm long, it is required to bend a rectangle of the largest area. What are the dimensions of this rectangle