Use the image of quadratic function to find the square of the approximate root X of the following equation + 5x-3 = 0

Draw a picture, y = x2 + 5x-3, estimate the two intersections with the X axis, that is, the approximate root

RELATED INFORMATIONS

1. Using trapezoidal method to calculate the approximate value of definite integral (accurate to 0.0001)
2. Let the left and right focus of the ellipse be F1, F2, and if there is a point P on the ellipse, let ∠ f1pf2 = 90, find the value range of E
3. The range of the square + 2x + 2 of the function y = x + 1 / X is
4. The function f (x) = loga (a-ka ^ x) and the domain of definition of function f (x) is a subset of set {X / X & lt; = 1}
5. Let f (x) = AX2 + BX + C (a, B, C ∈ R). If x = - 1 is an extreme point of the function y = f (x) ex, then the following image cannot be () A. B. C. D.
6. Let f (x) = ax ^ 2 + BX + C. if f (x) = - 1 is an extreme point of F (x) e ^ x, then the following image cannot be the image of y = f (x)? There are 4 pictures, because the level is too low to upload pictures, A. Open up parabola, vertex at (- 1,0), intersects with the positive half axis of y-axis B. open down parabola, vertex at (- 1,0), intersects with the negative half axis of y-axis C. open down parabola, vertex in the first quadrant, intersects with the negative half axis of y-axis (two intersections with X-axis) D. open up parabola, vertex in the third quadrant (two intersections with X-axis)
7. F (x) = LNX + x ^ 2 + ax, if f (x) is an increasing function in its domain of definition, how to find the derivative of a-
8. F [x] = e ^ ax LNX in the domain of definition is the range of increasing function to find a
9. Given the function f (x) = LNX + X & # 178; + ax (a ∈ R), if the function FX is an increasing function in its domain of definition, find the value range of A
10. Given function f (x) = INX, G (x) = ax ^ 2 / 2 + BX (a is not equal to 0) 1. If a = - 2, the function H (x) = f (x) - G (x) is an increasing function in its domain of definition, the value range of real number B is obtained 2. Under the conclusion of 1, let function ψ (x) = e ^ (2x) + be ^ x, X ∈ [0, in2], find the minimum value of function ψ (x) (the minimum value is represented by the formula containing B)
11. Write a program, (C language) to find the root of the quadratic equation AX + BX + C = 0
12. If the slope of an asymptote of the hyperbola whose center is at the origin and focus is on the coordinate axis is 2 / 7, the eccentricity of the hypohyperbola can be calculated
13. Solving equations 2A + B = 7 2a-b = 1
14. First simplify, then evaluate: (xy-3x ^ 2) - 2 (xy-2x ^ 2-1), where x and y satisfy the condition x + 2 + (Y-1) ^ 2 = 0
15. If the derivative value of the function y = x ^ 4 + ax ^ 2-4 / 3A at x = a is 0, what is the constant a
16. As shown in Fig. 1, in RT △ ABC, ∠ ACB = 90 °, point 0 is the midpoint of BC, D is the upper moving point of AB, extend do to e, and OE = OD, connect CE (1) As shown in Figure 2, if D is the midpoint of AB, please judge the shape of quadrilateral EDAC and explain the reason; (2) as shown in Figure 3, if ∠ a = 60 ° and ∠ BOD = 30 °, is quadrilateral EDAC isosceles trapezoid? Please explain the reason; (3) if AC = 15, ab = 25, please make the location of point D in Figure 4 to minimize the perimeter of the quadrilateral EDAC, please complete the figure and find out the minimum perimeter of the quadrilateral EDAC
17. Given that vectors a and B satisfy the absolute value (a-b) = 1 and B = (3,4), the value range of absolute value a is to seek the help of the great God
18. (very simple basic problem) urgent Let x ~ n (5,4), find a such that P {x}
19. If a ∈ {x ᦇ 178; - 2x + a = 0, X ∈ r} find the set of values of real number a
20. How to judge whether a function is symmetrical about the origin (except drawing images)