8-4.68/4.5x (0.25 + 0.5) simple algorithm

8-4.68/4.5x (0.25 + 0.5) simple algorithm

8-4.68/4.5X(0.25+0.5)
=8-468/450*(25+50)/100
=8-468/(75*6)*75/100
=8-468/6/100
=8-6*78/6/100
=8-78/100
=(800-78)/100
=722/100
=7.22

A right triangle has 6 and 8 sides, another right triangle similar to him has 3 and 4 sides and X, so how many values of XD are there

Two
1) When 6 and 8 are right angles, x = 5
2) When 8 is a hypotenuse, x = √ 7

Solving equation 2 / x + 3 / (12-x) + 20% = 1
emergency

It's you again, the title is wrong

The tangent equation of the curve y = x ^ 2 + 3 / X-1 at x = 2 is

y=x^2+3/x-1
y'=2x-3/x^2
y(2)=4+3/2-1=9/2
y'(2)=4-3/4=15/4
The slope is 15 / 4
Suppose the tangent equation
y=kx+c
9/2=15/4*2+c
c=-3/2
The tangent equation is y = 15 / 2 x-3 / 2

The following statement is correct: a positive and negative integers are collectively called integers; B integers and fractions are collectively called rational numbers

Choose B
A forgot to say 0
If you agree with my answer, please click the "select as satisfied" button below,

Let f (x) = √ 3sin Π X / m. if the extreme point x ″ of F (x) satisfies x ″ & # 178; + [f (x)] &# 178; < M & # 178;, then the value range of M is?

πx'/m=(k+1/2)π,k∈Z,
∴x'=m(k+1/2),
The result is [M (K + 1 / 2)] ^ 2 + [√ 3sin (π X / M)] ^ 20,
When k = 0, - 1, ① becomes [√ 3sin (π X / M)] ^ 22 or m

If the product of a number and its reciprocal plus the reciprocal of a is 8 / 9, find the reciprocal of A,

The reciprocal of a is - 1 / 9
Because the product of any number and its reciprocal is 1, 1 + 1 / a = 8 / 9
So 1 / a = - 1 / 9

Find the equation of the line l1:3x-4y-6 = 0 with respect to the line l:2x-3y + 1 = 0 symmetry

Because of tedious, once gave up. (may be my shallow knowledge, unexpectedly could not find a clever method) after a week, but still no one answered. No way, straight good hard on the scalp
Intersection a (22,15) of L1 and l
Choose a point B (6,3) on L1 (different from a)
Let BH ⊥ l BH equation Y-3 = (- 3 / 2) (X-6) = > 2y-6 = - 3x + 18 = > 3x + 2y-24 = 0
Vertical foot H (70 / 13,51 / 13) [simultaneous solution of BH & L equations]
The symmetry point B '(62 / 13,63 / 13) of B with respect to h [XB + XB' = 2xh, Yb + Yb '= 2yh]
Then b'a equation: Y-15 = [(63 / 13-15) / (62 / 13-22)] (x-22)
Sorting: 33x-56y + 114 = 0 for the demand

Finding the zeros of the function y = x ^ 3-4x ^ 2 + 4x-1

y=(x^3-1)+(4x-4x^2)=(x-1)(x²+x+1)-4x(x-1)=(x-1)(x²-3x+1)=0
X-1 = 0 or X & # 178; - 3x + 1 = 0
X = 1 or x = (3 ± √ 5) / 2

The image of parabola y = x & sup2; - 4x + C (c > 0) intersects with X axis at points a and B, and the starting vertex is w. if △ ABM is isosceles RT △, the value of C is obtained
The image of parabola y = x & sup2; - 4x + C (c > 0) intersects with the X axis at points a and B, with the starting vertex W. if △ ABM is isosceles RT △, the value of C is obtained.

The image of parabola y = x & sup2; - 4x + C (c > 0) intersects with X axis at point a and point B. let a point coordinate be (a, 0) and B point coordinate be (B, 0), where a + B = 4, a * b = C, y = x & sup2; - 4x + C (c > 0) = (X-2) ^ 2 + C-4, and the coordinates of vertex W are: (2, C-4). If △ ABM is isosceles RT △, | ab | = | A-B | = 2 (C-4), a ^ 2 + B ^ 2 -