If P is a prime and a is any integer, then a is divisible by P or?

If P is a prime and a is any integer, then a is divisible by P or?

Mutual prime

If the absolute value of X + 1 + the square of (y + 2) = 0, find the value of the algebraic formula (x square + 2XY + y Square) - (x square - 2XY + y square 0)
If the absolute value of X + 1 + the square of (y + 2) = 0, find the value of the algebraic formula (the square of X + 2XY + y) - (the square of X - 2XY + y).

If the absolute value of X + 1 + the square of (y + 2) = 0
x+1=0 x=-1
y+2=0 y=-2
(x squared + 2XY + y squared) - (x squared - 2XY + y squared)
=x²+2xy+y²-x²+2xy-y²
=4xy
=4x1x2
=8

The graph of function y = LG (2 / (x + 1) - 1) is about ()
(A) X-axis symmetry (b) Y-axis symmetry (c) origin symmetry (d) straight line y = x-symmetry

Let f (x) = y = LG ((1-x) / (1 + x))
f(-x)=lg((1+x)/(1-x))=-f(x)
So f (x) is an odd function, so f (x) is symmetric about the origin, choose C

Fill in the appropriate prime number on the horizontal line, which cannot be repeated=______ +______ +______ ．

According to the definition of prime number, 23 = 5 + 7 + 11; or 23 = 13 + 3 + 7; so the answer is: 5, 7, 11 or 13, 3, 7

Let the probability density of the random variable X be f (x), y = - 2x + 3, then the probability density function of Y

The quadratic function f (x) = ax ^ 2 + BX + C satisfies that ① f (- 1) = 0, ② x ≤ f (x) ≤ (x ^ 2 + 1) / 2 is constant, and the expression of F (x) is obtained
The more detailed the better, I understand the ability is relatively weak

The first floor is wrong, B = 0.5, a + C = 0.5. Then from F (x) - x > = 0, we get: (B-1) ^ 2-4 * a * C = 0, we get a = 0.25, so the original formula is: a = 0.25, B = 0.5, C = 0.25

What's 18 / 26?

0. If it is rounded, it should be 0

If a ^ 2 + B ^ 2 + 2A + 4B = - 5, then 4A ^ 2-1 / 4B ^ 4

Make a vertical line from a vertex of a triangle to its opposite side. The line between the vertex and the perpendicular foot is called the line of the triangle______ ．

Make a vertical line from a vertex of a triangle to its opposite side. The line between the vertex and the perpendicular foot is called the height of the triangle

When k takes what value, the quadratic inequality 2kx + kx-3 / 8 < 0 holds for all real numbers x?
Please help me with this problem

2kx + kx-3 / 8 ＜ 0 holds for all real numbers x, and the function f (x) = 2kx ^ 2 + kx-3 / 8 is open downward, 2K