(1) In triangle ABC, if a > b, the value range of perimeter L is? (2) Given that the lengths of the three sides of a triangle are 14, 3x and 4x, then the value range of X is? (3) Given that a, B and C are the three sides of a triangle, then the value of the algebraic formula A ^ 2-2ab + B ^ 2-C ^ 2 A greater than zero, B equal to zero, C less than zero, D cannot be determined

(1) L = a + B + C and a-b

The greatest common factor of a and B is 18 and the least common multiple is 180, where a is 36 and B is 18______ ．

Because 180 △ 18 = 10, 10 = 2 × 5, where the number a is 36, 36 = 18 × 2, so the number B is: 18 × 5 = 90, answer: the number B is 90. So the answer is: 90

E-commerce encryption technology M = please let me know, K1 = D, K2 = what~

I don't know

Is way a countable noun or an uncountable noun? If so, what is its plural?

Is a countable noun ways.Scientists Scientists are trying to find ways to prevent disease

The parabola y = AX2 + BX + C intersects the X axis at two points a and B, intersects the Y axis at point C, and the vertex is p. if a (- 1,0) B (3,0) OC = ob, the analytic formula can be obtained

(1) According to the meaning of the title: OB = 3, so OC = ob = 3, that is C (0, - 3) Jingyou net
Let y = a (x + 1) (x-3) be the analytic expression of the parabola. If the parabola is known to pass through point C, then there is
a（0+1）（0-3）=-3,a=1
The analytical formula of parabola is y = x2-2x-3

The second power of a + the second power of B + the second power of C - AB BC CA = 0, please deduce a = b = C
I came across a problem by chance
Please write down every step

The second party of a + the second party of B + the second party of B + the second party of a + the second party of a + the second party of a + the second party of a + the second party of a + the second party of a + the second party of a + the second party of a + the second party of a + the second party of a + the second party of a + the second party of a + the second party of a + the second party of c-ab-bc-ca = 02A & \35;\\35;\\35;\\35;\\\\\\#\\\\\\\\\\\\\\\\soa-b = 0, B-C = 0

It is known that the parameter equation of curve C1 is x = 4 + 5cost

(1) The parametric equation of curve C1 is x = 4 + 5cost y = 5 + 5sint (t is the parameter), and (x-4) ^ 2 + (Y-5) ^ 2 = 25 is the ordinary equation of circle C1, that is, x ^ 2 + y ^ 2-8x-10y + 16 = 0. Substituting x = ρ cos θ, y = ρ sin θ into the above formula, we can get the equation of circle C1

Decomposition factor: (1) & nbsp; 25-16x2 (2) & nbsp; B2 (x-3) + B (3-x) (3) & nbsp; (m-n) 2-14 (m-n) + 49

（1） 25-16x2=（5+4x）（5-4x）；（2） b2（x-3）+b（3-x）=b（x-3）（b-1）（3）（m-n）2-14（m-n）+49=（m-n-7）2．

It is known that, as shown in the figure, in the plane rectangular coordinate system xoy, one side OC of RT △ OCD is on the x-axis, ∠ C = 90 °, point D is in the first quadrant, OC = 3, DC = 4, and the inverse scale function passes through the midpoint a of od
(1) Finding the analytic expression of inverse proportion function
(2) If the inverse proportion function and the DC on the other side of RT △ OCD intersect with point B, the analytical formula of the straight line of two points a and B is obtained
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(1) Let the inverse scale function be y = K / X. according to the meaning of the problem, the coordinates of point a are (1.5,2)
Taking a (1.5,2) into the formula, i.e. 2 = K / 1.5, the solution is k = 3
So, the inverse scale function is y = 3 / X
(2) Let the analytic formula of line AB be y = ax + B
It can be obtained from the point B where the inverse proportional function intersects the DC on the other side of RT △ OCD
The abscissa X of point B is 3, and the ordinate y = 3 / x = 1, that is, B (3,1), and a (1.5,2), then there is
1=3a+b --------（1） 2=1.5a+b --------（2）
The joint formula (1) (2) can be obtained: a = - 2 / 3; b = 3
Therefore, the analytic expression of line AB is y = (- 2 / 3) x + 3 or 3Y + 2x-9 = 0

Find limit limx ^ 2 / X-1 X - > 1
lim(x+e^2x)^1/x x->0

First, the logarithm is reduced to LIM (X -- > 0) ln [(x + e ^ 2x-1) + 1] / x = LIM (X -- > 0) [e ^ 2x-1 + x] / X
=lim(x-->0)e^2x-1/x+lim(x-->0)x/x=3
So the original limit is e ^ 3