If the quadratic radical X-1 is meaningful, then the value range of X is () A. x＜1B. x＞1C. x≥1D. x≠1

If the quadratic radical X-1 is meaningful, then the value range of X is () A. x＜1B. x＞1C. x≥1D. x≠1

∵ the quadratic radical X-1 is meaningful, ∵ X-1 ≥ 0, the solution is x ≥ 1

① If the value of the algebraic expression X / 5-5 is "greater than" the value of X / 2-2, then what is the value range of X. ② the inequality 3x-2a ≤ - 2 of X is used to find the value of A

If x / 5-5 ＞ X / 2-2, multiply both sides of the inequality by 10, we get 2x-50 ＞ 5x-20, and the solution is x ＜ - 10
3x-2a ≤ - 2, shift term 3x ≤ - 2 + 2a, divide both sides of inequality by 3 to get x ≤ (- 2 + 2a)) / 3

The value of the algebraic formula 1-x-2 / 2 is not greater than the value of 1 + 3x / 3, that is, what is the value range of X?

Greater than or equal to 1 / 2

What is the minimum value of polynomial x ^ 2-2x + 1

x²-2x+1=(x-1)²
When x = 1, the value of polynomial X & # 178; - 2x + 1 is the minimum, and the minimum value is 0