Product and division of functions

Discuss how errors propagate in sum, difference, product and division of quantites.

Product Design is a function of

Prove that the product of two even or two odd functions is an even function, whereas the product of an even and an odd function is an odd function.

Division of fractions the division of a fraction (a)/(b) by a non - zero fraction (c)/(d) is defined as the product of (a)/(b) with the multiplicative inverse or reciprocal of (c)/(d)

Prove that the product of two odd functions is an even function while their sum is an odd function.

Production function explains the relationship between :