The range of the square + 2x + 3 of the function y = x is

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• 1. The range of the function y = 3x-1 / X
• 2. On the problem of absolute value piecewise function Function y = x + 1 + X-2 (1) Why is the - 2x + 1 domain x less than - 1 y= (2) 3 (3) Why is 2x-1 domain x greater than or equal to 2
• 3. On writing piecewise function with absolute value removed |Why is X & # 178; - 4x | written as X & # 178; - 4x (x ≤ 0) - X & # 178; + 4x (0 ＜ x ＜ 4), X & # 178; - 4x (x ≥ 4) I know this is the form of piecewise function. I just don't know how to get rid of the absolute value to write this form. Don't tell me the answer directly according to the image. I want to know the effective method and idea to solve this problem
• 4. Is the function with absolute value necessarily segmented?
• 5. How can a function with absolute value be expressed as a piecewise function For example, how does f (x) = | x | / x + X become a piecewise function
• 6. How to draw piecewise function with absolute value? It's better to sum up the rules,
• 7. The range of function y = x square + 5x + 6 Such as the title
• 8. The range of function y = 2 - √ (- x ^ + 4x)
• 9. If we know that the x square of the function y = a (a is greater than 0 and a is not equal to 1) passes through the point (- 2,9), then a=
• 10. For the function y = f (x), if there is an interval [a, b], when x ∈ [a, b], the value range of F (x) is [Ka, KB] (k > 0), then y = f (x) is called k-times value function. If f (x) = LNX + X is k-times value function, then the value range of real number k is______ ．
• 11. To find the range of the function y = x ^ 2 / x ^ 2 + 1 (the square of x plus the square of 1 / 2 of x), I use x ^ 2 = Y / y + 1 to find the range of [0.1] Then I use another method to change the original formula to 1 / y = 1 + 1 / x ^ 2, but the result is wrong. What's wrong with this method? I know how to calculate it. I use the second method to solve 1 / 2, but I just can't figure out what's wrong with the second method.
• 12. Y = 3x-2 / x + 1 (x > 0)
• 13. Y = 3x, X belongs to {0,3,6}, find the range
• 14. What is the range of y = (x + 2) / (x ^ 2 + 3x + 6)? Urgent, thank you!
• 15. Find the range 1, y = (x + 2) / (x * x + 3x + 6) 2, y = 3x / (x * x + 4)
• 16. The range of y = - x ^ 2 + 3x-4 Writing process
• 17. Find the range of y = (x-3x + 4) / X
• 18. Find the range of y = 1 / (2x ^ 2 - 3x + 1)
• 19. High school mathematics evaluation field y = √ x + √ (3-3x)
• 20. Find the function f (x) = 3x ^ 2-5x + 2. X belongs to the range of [0,2]?