Square Root Function Online Tutoring - Maths Tutors

Square Root Function Online Tutoring - Maths Tutors Square root function is a function which is represented with the radical sign . Inside a square root, a number or an expression can be placed and we can find the square root of it. The parent function or the basic square root function is y = x and here y is the function value also known as f(x) and x is the variable. All other square root functions can be derived from this parent function and can be graphed on the X-Y coordinate plane. Example 1: Given the square root function, f(x) = (5x). Find the function value when x is equal to 4. Given square root function: f(x) = (5x) In order to find the function value or the y value at x = 4, we substitute x = 4 in the above square root function. This gives: y = f(4) = (5 * 4) = 20. We can simplify 20 by writing its prime factors== 20 = (2* 2* 5) = 25. Therefore 20 or 25 is the function value at x = 4. Example 2: Given the square root function, f(x) = (x + 6). Find the function value when x is equal to 3. Given square root function: f(x) = (x + 6) In order to find the function value or the y value at x = 3, we substitute x = 3 in the above square root function. This gives: y = f(3) = (3 + 6) = 9. 9 is a perfect square since 9 can be written as 3 * 3. Hence 9 = (3 * 3) = 3 Therefore 3 is the function value when x = 3.