Find the image of function y = x square + 1 / X (x is not equal to 0) Teach me the method

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• 2. The intersection coordinates of the inverse scale function and the positive scale function If there is an intersection (m, n) between the positive scale function y + K1X (K1 ≠ 0) and the inverse scale function y = K2 / X (x ≠ 0), then the coordinates of the other intersection are (,) 2. In the same coordinate system, make the image of function y = 2 / X and function y = X-1, y = X-1, and use the image to find their intersection coordinates
• 3. Why is a nonempty subset obtained in this way = 2 ^ n-1? (n represents the number of subsets)
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• 6. How to solve the equation 4 / 1 = Y-10 / x + 8 - y + 32 / x + 18 The column above is wrong -1. Wrong The original problem is: a fraction, such as numerator plus 8, denominator minus 10, the simplified value is equal to 4 / 3; such as numerator plus 18, denominator plus 32, the simplified ﹛ x-10/y+8=4/3 The value after is equal to 2 / 1, and this fraction is (hint: let the fraction be x / Y {to solve this equation ﹛ x+32/y+18=2/1
• 7. 1. Find out the angle a (0 ° ≤ a < 360 °) where the end edges of the following angles coincide, and judge which quadrant the following angles are （1）-1441°（2）1790° 2. Fill in the blanks (1) The set of the first quadrant angles is: (2) The set of angles of the end edge on the coordinate axis is:
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• 9. Mathematical calculation problem: (- 1 and 1 / 2) - 1 and 1 / 4 + (- 2 and 1 / 2) - (- 3 and 3 / 4) - (- 1 and 1 / 4) + 4 =? |-2 and 1 / 2 | + (- 3.7) + | - (+ 2.7) | - - (7 and 1 / 2) | =?
• 10. In triangle ABC, the area of triangle ABC is 90, C = 5cm, a: B = 2:3?
• 11. When m is the value, the quadratic equation MX2 + (m-1) x + M = 0 (1) If the solution set of the inequality MX2 + (m-1) x + m > 0 is r, the value range of M is obtained I think there is something wrong with the title.
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• 14. A gymnasium inlays the floor with rectangular wood blocks of the same size, and paves two blocks for the first time, as shown in Figure 1. The second time completely encloses the first time, as shown in Figure 2 and figure 3 The second paving is completely enclosed, as shown in Figure 3. In this way, after the nth paving, the letter N is used to indicate the number of wood blocks used in the nth figure
• 15. Figure 1 is 9cm in length and 6cm in width, figure 2 is 3cm in length and figure 3 is 12cm in width
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• 18. In triangle ABC, if angle a + angle B = 2 angle c, angle a-angle C = 40 °, what triangle is it?
• 19. If a, B and C are the three sides of triangle ABC, and 3 (a square + b square + C Square) = (a + B + C) square, judge the shape of triangle ABC?
• 20. In the triangle ABC, a, B and C are the opposite sides of ∠ a, B and C respectively. Try to compare the square of a-b-c and the square of 2BC