Professor ElvisZap teaches you how to stretch shift and reflect the graph of a square root. A square root function is the opposite of a squared function. You start with y=square root of (x1) it becomes 0<=x1. then 1 <=x. You use the graph and solve it as you would for any function using small values first, then you have y=square root of x  1, the domain 0<=x. This shifted the graph down 1 unit. 0=square root of x  1, 1=square root of x, 1=x. Then the range is [1 + infinity). Continue in the same manner for the rest of the equations and remember to practice.
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