Xiaoming and Xiaogang discuss, at noon he called him to go to school together to change the sentence Revise the wrong sentence

Xiaoming and Xiaogang discuss, at noon he called him to go to school together to change the sentence Revise the wrong sentence

Xiao Ming and Xiao Gang discuss, at noon he called him to go to school together
Xiao Ming and Xiao Gang discuss, Xiao Ming shouts Xiao Gang to go to school together at noon

A bought 5 story books and 4 comic books for 52.6 yuan, B bought 4 story books and 5 comic books for 51.8 yuan, how much is each story book and comic book

1 story book and 1 comic book is (52.6 + 51.8) / 9 = 11.6
Storybook 52.6-4 * 11.6 = 52.6-46.4 = 6.2 yuan
Comic 11.6-6.2 = 5.4 yuan

It is known that the quadratic equation mx2-3 (m-1) x + 2m-3 = 0 (M is a real number) of X (1) if the equation has two unequal real roots, find the value range of M; (2) prove that no matter what the value of M is, the equation always has a fixed root; (3) if M is an integer and both roots of the equation are positive integers, find the value of M and all roots of the equation

(1) ∵ (?) = b2-4ac = [- 3 (m-1)] 2-4m (2m-3) = (M-3) 2, ∵ equation has two unequal roots of real numbers, ∵ (M-3) 2 ＞ 0 and & nbsp; m ≠ 0, ∵ m ≠ 3 and & nbsp; m ≠ 0, the value range of ∵ m is m ≠ 3 and & nbsp; m ≠ 0; (2) it is proved that the root formula x = − B ± B2 − 4ac2a = 3

Let a and B be the left and right vertices of ellipse C: x2 / A2 + Y2 / B2 = 1 (a > b > 0), f be the right focus, l be the tangent of ellipse C at point B
Let a and B be the left and right vertices of the ellipse C: x2 / A2 + Y2 / B2 = 1 (a > b > 0), f be the right focus, l be the tangent of the ellipse C at point B, p be any point on the ellipse C different from a and B, and the line AB intersects l at D, m be the midpoint of BD
1. FM bisector angle PFB
2. PM is tangent to ellipse C
3. PM bisector angle FPD
4. So that P point P of PM = BM does not exist
The correct conclusion is-----

The first and the second are right

0.1+0.2+0.3+0.4+…… +9.7 + 9.8 = () (clever calculation)

Let 0.2 + 9,8 = 10, 0.3 + 9,7 = 10 and so on

On the square + / ax + by-16 / = 0 of the equation (ax-by + 8) of X and y, a set of solutions are x = 2, y = 2,
Finding the solution set of 13X + 9 of the inequality system ax-3b about X, y

The absolute value and the square are both nonnegative numbers. When two nonnegative numbers are added, only two of them can be zero
So when x = y = 2, ax-by + 8 = ax + by-16 = 0
Substituting XY, we get 2a-2b + 8 = 2A + 2b-16 = 0
The solution is a = 2, B = 6
Substituting into the system of inequalities, we get 13X + 9 of 2x-36
The solution is - 6 less than x less than - 3

The distances from a focal point to the two ends of the long axis are 5 and 1, respectively

It can be calculated from the questions
2A = 5 + 1 = 6, that is, a = 3
2C = 5 - 1 = 4, that is, C = 2
Then B ^ 2 = a ^ 2 - C ^ 2 = 9 - 4 = 5
That is, B = √ 5
Therefore, the standard equation of the ellipse is as follows:
x^2 / 9 + y^2 / 5 = 1

What is the formula of 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 +... + n =

Gauss formula for the number of multiplicative terms of the first term plus the last term divided by 2

How to solve the equation when 2 minus x equals 0.75

"Early summer raindrops page" Hello, I'm glad to answer for you!
2 minus x equals 0.75
x=2-0.75
x=1.25
I hope my answer will help you~

0.3939… [0.39, 39 cycle] is equal to what fraction?

13/33