On the roots of equations and the zeros of functions 1. It is known that the real numbers a, B and C are three numbers in the domain of y = f (x), and satisfy a

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• 3. It is known that there are only six integer solutions to the inequality system X − a ＞ 03 − 2x ＞ 0, then the value range of a is () A. （-∞，-4）B. [-5，-4）C. （-5，+∞）D. (−5，−32)
• 4. Given that point a (a-2,2b + 1) is a point in Cartesian coordinate system, its symmetric point about origin is B (- 2, - 5), try to find the arithmetic square root of ab The process of calculation
• 5. Find the slope of the straight line 3x + 4y-5 = 0 and its intercept (process) on x-axis and y-axis
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• 8. If the absolute value of a = 3, the absolute value of B = 5, and a is different from B, then the absolute value of (a-b) =?
• 9. The image of the function f (x) = | x + 1 | + | x-a | (x ∈ R, a is a constant) is symmetric about the y-axis The image of the function f (x) = ┃ x + 1 ┃ + ┃ x-a ┃ (x ∈ R, a is a constant) is symmetric about the Y axis. (1) find the value of a (2) Let G (x) = f (x-t) - f (x + T), judge the parity of G (x), and give the proof
• 10. Find the range of function y = sin (2x + π / 3), X ∈ (- π / 6, π)
• 11. How many hours is 1600 minutes in three? Thank you very much,
• 12. 6 / 11 △ () 6 / 16 × 4 / 17 5 / 16 3 / 17 6 / 39 / 4 / 4 / 4 1 / 4 9 / 4 × 4 / 1 Fill in ">" < "=" in () for the quickest answer
• 13. It is known that the equation of X, where the square of x plus (2m minus 1) x plus the square of M is equal to 0, has two real roots x 1 and x 2
• 14. The perimeter of a rectangle is 24cm. If the length of the rectangle is reduced by 2cm and the width is increased by 3cm, it will become a square. Find the area of the original rectangle? Use x solution
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• 16. First simplify and then calculate, as follows Given x = (√ 3 - √ 2) \ (√ 3 + √ 2), y = (√ 3 + √ 2) \ (√ 3 - √ 2), find the value of x ^ 2 + 2XY + y ^ 2 and X / y + Y / X
• 17. The radius of circle a is 2 cm, and the diameter of circle B is 4 cm. Are the perimeter of the two circles equal?
• 18. If point a (- 2, Y1) and point B (- 1, Y2) are both on the image with inverse scale function y = - 2 / x, then the size relationship between Y1 and Y2 is y1
• 19. As shown in the figure, the image of the first-order function Y1 = x + 1 and the image of the inverse scale function y2 = KX (k is a constant and K ≠ 0) pass through point a (m, 2) (1) find the coordinates of point a and the expression of the inverse scale function; (2) compare directly with the image: when x > 0, the sizes of Y1 and Y2
• 20. Find the intersection coordinates a and B of the inverse scale function y = 2 / X and the linear function y = 2x-1, and find the area of the triangle AOB