How to draw the image of y = 1 / x ^ 2?

As shown in the picture

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1. How to draw the image of y = | x + 1 | + | 2-x | The three intervals of y = | x + 1 | + | 2-x | are 3, 2x-1 and - 2x + 1 respectively. How to draw this kind of image? Another way of saying is that the solution of an interval is - 3, and the absolute value should not be negative, right?
2. The graph of absolute value quadratic function
3. Does the same shape of quadratic function mean the same value of a or the same absolute value of a
4. The absolute value of a of two quadratic functions is equal. Are the image shapes of the two quadratic functions the same
5. If the image of quadratic function y = (M + 5) x2 + 2 (M + 1) x + m is all above the x-axis, then the value range of M is___ ．
6. If the image of quadratic function y = - x ^ 2 + 4x + m-2 is all below the x-axis, then the value range of M is____
7. When m is a sum, the function y = (m-2) x & # 178; + 3x-2 is a quadratic function
8. It is known that the function y = (M + 2) x ^ m & # 178; + M-4 is a quadratic function of X. when x > 0, y increases with the increase of X. The analytic formula and its maximum value of the function are obtained
9. Given the intersection point (- 2,1) of the image of positive and negative scale functions, the analytic expression of these two functions and the coordinate of their other intersection point are obtained Help to analyze, no!
10. The graph of a quadratic function passes through (4,0) (2,0) (3,4) Because I don't know how to find the analytic expression of this function with the intersection formula, please write the process... The answer can't be calculated if it's troublesome. Thank you
11. |How to draw an image with y | = 1 / x? How to draw this picture? Don't just give the picture some thinking process
12. How to draw the image of y = x / X-1
13. In RT △ ABC, ∠ C = 90 °, AC = 8, BC = 6, P is the moving point on the inscribed circle m of △ ABC, and the minimum value of the sum of the areas of the three circles with PA, Pb and PC as diameters is obtained
14. Given the function f (x) = ln (1 + x) - X1 + X. (1) find the minimum of F (x); (2) if a, b > 0, prove: LNA LNB ≥ 1-ba
15. It is known that the three sides of a triangle form an arithmetic sequence, the perimeter is 36 cm and the area is 54 cm 2
16. The vector a = (COSA, Sina), B = (- 1,2,3,2) proves that the vector a + B is perpendicular to a-b. when 2A + B = a-2b, the angle α is obtained
17. It is known that, as shown in the figure, the vertices of the equilateral triangle def are on the edges of the equilateral triangle ABC. Proof: ad = be = CF
18. Can multiplication of vector modules be equal to negative values For example: can a module multiply B module equal to minus one? I do a math problem, is two modules multiplied by negative one ~
19. It is known that ∠ ace = ∠ CDE = 90 °, point B is on CE, CA = CB = CD, through the circle intersection ab of a, C and D to f (as shown in the figure). It is proved that f is the heart of △ CDE
20. What is the formula for finding the cosine of the angle between two known vectors?