Given that the equation (3K + 1) x ^ + 2kx = - 3 is a quadratic equation of one variable about X, try to find the solution set of inequality 1 / 2 (k-1) greater than or equal to - 1

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• 1. On the X inequality 3K (x-1) - 1 > - 8-3k (K ≠ 0), the solution set is x > 7, and the value of K is obtained
• 2. Let K be a real number. The two real roots of the quadratic equation x2 + KX + K + 1 = 0 of X are X1 and X2 respectively. If X1 + 2 [x2] 2 = k, the value of K is obtained RTRTRTRTRT It doesn't matter. I already know the answer. Now it depends on who answers. -
• 3. Evaluation and simplification of the simplest quadratic radical When x = (2 minus root sign 3) 1 / 2, find the value of the algebraic formula (square of x minus 4x plus 2). Please continue to explain how to do step by step in detail. Thank you very much! I have an answer here, but I don't get it. Answer: because (x = 2 plus root 3) so (X-2 = root 3) so (square of x minus 4x + 4 = 3) how does this "square of x minus 4x + 4 = 3" come from? Thank you. I really don't understand
• 4. Use descriptive method to represent the following set: 1. Set composed of a city in Beijing; 2. Set of all even numbers
• 5. The proper methods are as follows: (1) the set composed of all nonnegative even numbers; (2) the set composed of all positive integers less than 20 which are both odd and prime numbers; (3) the set composed of the first-order factor of the square of x-16; (4) the set composed of all points on the line y = X····
• 6. Is odd divided into positive odd and negative odd? Even? What is 0
• 7. Calculating rational numbers skillfully, -1+3-5+7-9+…… -97+99
• 8. Use the power of addition, subtraction, multiplication and division to make the result equal to 24 Please help me.............
• 9. A question about multiplication and division of rational numbers Known: 1 + 2 + 3 +33=17x33 Calculate 1-3 + 2-6 + 3-9 + 4-12 + +31-93+32-96+33-99 I hope the process can be more detailed
• 10. The concept of multiplication and division of rational numbers The absolute value of the multiplier is equal to the -?
• 11. If the equation MX + 3Y = 1-5x is a linear equation with one variable, then M emergency
• 12. What is the Quasilinear equation of an ellipse? In practice, I suddenly ask you to find the Quasilinear equation of an ellipse But it's not mentioned in the textbook I know the equation is x = plus or minus a ^ 2 / C But what is the so-called guide line drawn on the graph? What does it represent? I'm very unfamiliar with it, and I'll write down how much about it
• 13. What is the Quasilinear equation of an ellipse The focal distance is 2C The longest axis is a The shortest axis is B What is the quasi-existent equation?
• 14. The parametric equation of known ellipse {x = 3cos θ, y = 2Sin θ (θ is a parameter) Find the shortest distance from the moving point P on the ellipse to the straight line {x = 2-3T, y = 2 + 2T (t is a parameter)
• 15. Given the ellipse x ^ / 4 + y ^ / 9 = 1, the slope of a group of parallel lines is 3 / 2? (1) When do these lines intersect the ellipse? (2) When they intersect the ellipse, it is proved that the line segments cut by the ellipse are focused on one line?
• 16. Take the slope of the straight line passing through the point (0,4) as t, and write the elliptic equation x square ratio 4 plus y square ratio 16 equal to 1 in the form of parametric equation with t as the parameter!
• 17. Given the vector PA (3, cos α), Pb = (sin α, 1) and PA ⊥ Pb, (1) find the value of Tan α, sin α, cos α, (2) find ì ab ì
• 18. If the equation x ^ 2sina-y ^ 2cosa = 1 (0 ≤ a
• 19. Let a belong to [0,2 π], and the equation x ^ 2sina + y ^ 2cosa = 1 denotes an ellipse with the focus on the X axis, then the value range of a is
• 20. The known curve {x = 2T, y = 2-T, t is a parameter The known curve {x = 2T, y = 2-T, t is the intersection of the parameter and X axis, Y axis and two points of AB, C moves up on the curve xv2 = - 4Y to find the minimum ABC of the triangle