Fractional addition and subtraction 3/x+1-3x/x+1=

Fractional addition and subtraction 3/x+1-3x/x+1=

Original formula = 3 (x + 1) / [x (x + 1)] + X (1-3x) [x (x + 1)]
=(3x+3)[x(x+1)]+(x-3x²)[x(x+1)]
=(3x+3+x-3x²)[x(x+1)]
=(-3x²+4x+3)/(x²+x)
3/x+1-3x/x+1= 3/x+1-3+1=3/x-1
3/x+(1-3x)/x+1=4/X -2
That's the question
3/x+1-3x/x+1=3(1-x)/x+1=-(3x+3-6)/x+1=[-3(x+1)+6]/x+1=(6/x+1)-3
3(1-x)/x+2
What is t in the formula~
What is the angular velocity of latitude 0, 22.5n and 66.5n? Which is the maximum linear velocity
When does the earth rotate slowly~
All of 23.5n are 15 ° / h
The maximum linear speed is 0
The slowest revolution must be apogee
How much is 120 replaced by a root
120=√14400
√120=2√30
Calculation by fractional addition and subtraction: B / A-B + A / B-A
b/a-b + a/b-a
=b/a-b - a/a-b
=b-a /a-b
=-1
The formula of linear velocity and angular velocity!
Linear velocity, v = 2 π R / T, angular velocity, w = 2 π / T, 2 π = 360 ° t is the period, which is the time to turn a circle, and another is w = the angle to turn / the time to turn this angle, PS. the angle to turn is expressed by π, π = 180 ° 2 π = 360 ° other degrees can be converted by yourself
V = wt
It is known that the side edges of the triangular prism abc-a1b1c1 are perpendicular to the bottom, the volume is nine fourths, and the bottom is an equilateral triangle whose side length is root 3
Here is a detailed explanation
The title is incomplete
The addition and subtraction of fractions, calculate the following formula
1.c/(4ab^2)-a/3bc^2
2.(x-y)/(7xy^2)+(x+y)/(6x^2 y)
3.m/(m+n)+(mn)/(n^2 -m^2)
1.c/(4ab^2)-a/3bc^2=(3c³-4a²b)/(12ab²c²)2.(x-y)/(7xy^2)+(x+y)/(6x^2 y)=(6x²+xy+7y²)/(42x²y²)3.m/(m+n)+(mn)/(n^2 -m^2)=(2mn-m²)/(n²-m²)
In uniform circular motion, the following physical quantities are invariant ()
A. Linear velocity B. angular velocity C. centripetal acceleration D. external force
A. In uniform circular motion, the linear velocity does not change and the direction changes all the time; so a is wrong. B. if the angular velocity of uniform circular motion does not change, the rotation speed does not change, so B is correct. C. if the centripetal acceleration always points to the center of the circle, the direction is changing, so C is wrong. D. if the combined force always points to the center of the circle, the direction is changing, so D is wrong
If R * is the greatest radius of the inscribed surface of a cone, then R * is the best~
The section of a cone is an equilateral triangle
Take the height of the square prism as H and the length of the bottom edge as a
Then (A / radical 2) / r = (radical 3 * R-H) / radical 3 * r
A = radical 2 / 3 * (radical 3 * R-H) = radical 2 * r - (radical 2 / 3) H
S = 4ah + 2AA = 4 radical 2 * rh-4 (radical 2 / 3) HH + 4rr-4 / radical 3 RH + 4 / 3hh
Finding the maximum on parabola
Stereogram is not easy to draw, use words to describe it: connect the center O of the bottom surface and a vertex a of the bottom surface of the regular prism, and extend the arc of the bottom surface to a '. In this case, the bottom center O, the cone vertex o ', and a' form a right triangle, which is similar to a'ad (AD is an edge of a prism). So ad: OO '= AA': Ao, that is, C: root 3R = (r-root 2 / 2 * c): R, C = (2 * root 3 + 3 * root 2) R / 2. Then the surface area of the square prism s = 6C * C = 36 + 18 6*^__ ^*)... Unfold
Stereogram is not easy to draw, use words to describe it: connect the center O of the bottom surface and a vertex a of the bottom surface of the regular prism, and extend the arc of the bottom surface to a '. In this case, the bottom center O, the cone vertex o ', and a' form a right triangle, which is similar to a'ad (AD is an edge of a prism). So ad: OO '= AA': Ao, that is, C: root 3R = (r-root 2 / 2 * c): R, C = (2 * root 3 + 3 * root 2) R / 2. Then the surface area of the square prism s = 6C * C = 36 + 18 6*^__ ^ *
50 exercises of fraction addition and subtraction in Grade 8
Make a couple
1.4 fractional equation 1. The following equations are fractional equations: (a) (b) (c) (d) 2. Solve the equation. (1); (2). 3. Solve the equation. 4. If the real number is not equal to zero, then. 5. At that time, the value of the fraction is; (6. Remove the denominator from the mode equation