It is known that the image of inverse scale function y = KX (k is a constant, K ≠ 0) is in the first and third quadrants. Please write a value of K that meets the above conditions______ (the answer is not unique)

It is known that the image of inverse scale function y = KX (k is a constant, K ≠ 0) is in the first and third quadrants. Please write a value of K that meets the above conditions______ (the answer is not unique)

∵ the image of inverse scale function is in quadrant one or three, k > 0, as long as it is all real numbers greater than 0. For example: 2

First simplify and then evaluate a ^ 2-B ^ 2 * a ^ 2-2ab + B ^ 2 / AB / AB-A ^ 2 / 1, a = 1 / 2, B = - 2 / 3

Hello
A ^ 2 of a ^ 2-B ^ 2 * a ^ 2-2ab + B ^ 2 of AB / AB-A ^ 2 of 1
=（a+b）（a-b)/a² * ab/(a-b)² *a(b-a)
=-b(a+b)
=2/3x(1/2-2/3)
=2/3x(-1/6)
=-1/9
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In △ ABC, ab = AC, BD is the center line on AC. if the perimeter of triangle abd is 2 longer than that of triangle BCD, and the perimeter of triangle ABC is 18, then BC =?

14/3
From ab = AC = a BC = B 2A + B = 18
Perimeter of triangle abd - perimeter of triangle BCD = ab-bc
a-b=2
2a+b=18
b=14/3
a=20/3
That is BC = 14 / 3
Absolutely. Don't worry about it later

How many square decimeters is 10 square decimeters and 6 square centimeters equal to

10 square decimeters and 6 square centimeters are equal to 10.06 square decimeters

If the length of the top and bottom of the trapezoid is 1 and 4 respectively, and the length of the two diagonals is 3 and 4 respectively, the area of the trapezoid is______ ．

As shown in the figure, a parallel line of AC is drawn through point D, and the extension line of BC is crossed at point E, ∵ ad ∥ BC, ∥ quadrilateral, aced is a parallelogram, ad = CE = 1, AC = de = 3. In △ BDE, BD = 4, be = BC + CE = 5, ∵ BD2 + de2 = 42 + 32 = 25 = be2, ∥ BDE = 90 °, s trapezoid ABCD = s △ abd + s △ CBD, = s △ CDE + s △ C

As shown in the figure, connect the middle points of each side of △ ABC to get a new △ a1b1c1, and then connect the middle points of each side of △ a1b1c1 to get △ a2b2c2. If this continues indefinitely, we get a series of triangles: △ ABC, △ a1b1c1, △ a2b2c2 The series of triangles tend to a point M. given a (0,0), B (3,0), C (2,2), the coordinates of point m are______ ．

The coordinates of point m are (0 + 3 + 23, 0 + 0 + 23), that is, (53, 23)

If the real numbers a and B satisfy the conditions a2-7a + 2 = 0, b2-7b + 2 = 0 (a ≠ b), then Ba + ab=______ ．

From the real numbers a and B satisfying the conditions a2-7a + 2 = 0, b2-7b + 2 = 0, a and B can be regarded as the two roots of the equation x2-7x + 2 = 0, a + B = 7, ab = 2, Ba + AB = A2 + b2ab = (a + b) 2-2abab = 49-42 = 452

Why are there no stars around the moon

Although the moon is very bright, it will weaken the surrounding starlight, but even in a big city, a clear night, the bright moon can still see a few stars, so the reason may be that the weather that night is not good, although it may be sunny, but if the air pollution is serious or there is some fog, the stars can not be seen, only the bright moon can be seen

When planing an Impatiens flower, what should be used to gently peel the flower layer by layer from the outside to the inside? What should be placed in rows and what should be placed on the white paper in turn

The operation essentials of anatomy: use tweezers to remove each part of the flower from the outside to the inside, clamp the tweezers at the base, and paste it on the record paper

If the x cube of 8 plus 27 equals 0, find X

The x cube of 8 plus 27 equals 0
8*x^3+27=0
x^3=-27/8
x=-3/2