Graph each piecewise function. then identify the properties.

Domain: (-∞, 1]\ U (1, ∞): All real numbers.

Range: [-1, ∞)

Step-by-step explanation:

This function is composed of two quadratic polynomial functions whose domain is all real numbers.

Observe in the graph that the function is continuous for the entire domain, it does not have any leap. Then, both parables have a minimum value. y = 1 and y = -1. Then we can conclude that for this piecewise function:

Domain: (-∞, 1]\ U (1, ∞): All real numbers.

Range: [-1, ∞)

a is the correct

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this