Right upper semicontinuous functions are defined by the property that the upper limit of the function as x approaches a point from the right equals the function's value at that point. Common examples include the absolute value function f(x) = |x|, the exponential function f(x) = e^x, the logarithm function f(x) = log(x), the square root function f(x) = sqrt(x), and trigonometric functions like f(x) = sin(x) and f(x) = cos(x). These functions illustrate the concept of right upper semicontinuity effectively. Understanding these examples can aid in further research on the topic. Right upper semicontinuous functions play a significant role in various mathematical analyses.