If we know that the function f (x) = the square of X and the square x + m + 1 of M has two zeros and their reciprocal sum is 4 / 3, then f (x)=

If we know that the function f (x) = the square of X and the square x + m + 1 of M has two zeros and their reciprocal sum is 4 / 3, then f (x)=

Let two zeros of F (x) be x1, X2, then X1 + x2 = M & # 178;, x1x2 = m + 1 ᚛ x1, the reciprocal sum of X2 is 4 / 3, that is, 1 / X1 + 1 / x2 = (x1 + x2) / (x1x2) = 4 / 3  M & # 178; / (M + 1) = 4 / 3  3M & # 178; - 4m-4 = 0 (m-2) (3m + 2) = 0

If the inequality system XM-1 has no solution, then the value range of M is

2x>m-1,
x>m\2-1\2.
m\2-1\2

The quadratic function y = 2x-4x + 3 is transformed into vertex form by formula method, y = how many gods can help

y=2x^2-4x+3 =2(x^2-2x+1)-2+3 =2(x-1)^2+1

Solving equation (x "multiplier," X "unknown)
3X3X432=4X4X x
There is another: 1500:1200 = (6-x): X

x=9*432/16
Multiply 16 by two 4's and divide 4 by 432 twice to get 27
x=27*9=243

It is known that the equation KX + M = (2k-1) x + 4 about X. when K and m are the values, the equation (1) has only one

kx+m=(2k-1)x+4
kx+m=2kx-x+4
(1-k)x=4-m
When k is not equal to 1, the equation has a unique solution
When k equals 1 and M = 4, the equation has innumerable solutions
When k is equal to 1 and M is not equal to 4, the equation has no solution

Solving equation 3.2x-16.2 = 75.32 2.9.6 + 2x = 39.2

3.2X-16.2=75.32
3.2x=91.52
x=28.6
9.6+2X=39.2
2x=29.6
x=14.8

Calculation: 3-x + X-1 (x > 5)

x>5
∴3-x0
simple form
=x-3+x-1
=2x-4
Friends who ask questions from mobile phones can click "comment" in the upper right corner of the client, and then they can choose "satisfied, the problem has been solved perfectly"

How to get rid of the brackets for the equation of degree one variable, such as - (x-1) + 7 = 3 (X-2) + 26

-（x-1)+7=3(x-2)+26
-x+1+7=3x-6+26
-x+8=3x+20
-x-3x=20-8
-4x=12
x=-3

1. The sign of the term of the fifth order determinant with product a31a25a14a43a52 is?

-
a31a25a14a43a52=a14a25a31a43a52
Then find the reverse number of 45132, which is 7
Sign = (- 1) to the 7th power

Factorization 4Y ^ 2 + 25X ^ 2-1-4y ^ 4

Original formula = 25X & # 178; - (4Y ^ 4-4y & # 178; + 1)
=25x²-(2y²-1)²
=(5x+2y²-1)(5x-2y²+1)