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Given a > 1 and a ^ LGB = 100, the minimum value of LG (AB) is Such as the title
lga^lgb=lg100
lga*lgb=2
LG (AB) = LGA + LGB > = 2 radical (LGA * LGB) = 2 radical 2
So the minimum value is 2, the root sign is 2
place
If x ≠ 0, then the minimum value of 2x & # 178; + 6 / X & # 178; is
2X ^ 2 + 6 / x ^ 2 > = 2 radical (2 x ^ 2 * 6 / x ^ 2) = radical (12) = 2 radical 3
The minimum value is 2 root sign 3
The negative third power of (a + 1) is known
It is reduced to 3-a-1, A1
The value range is 1
If the two numbers represented by the points m and N on the number axis are opposite to each other, and the distance between the two points is 7.6, what are the two numbers?
Let the coordinate of point m be (x, 0) and the coordinate of point n be (y, 0)
x=-y ①
According to the known results:
Ixl+lyl=7.6②
On behalf of (1) to (2) get:
lxl=lyl=3.8
So these two numbers are 3.8 and - 3.8
Given that the number axis points m and N respectively represent two numbers m and n which are opposite to each other, and the distance between the two points m and N is 6.4, then the two numbers m and N are ()
∵ m, n are opposite numbers
∴m=-n
The distance between two points is 6.4
The mathematical expression is: | M-N | = 6.4
Substituting M = - n into | M-N | = 6.4, we get: | 2m | = 6.4
|M | = 3.2 m = plus or minus 3.2 n = plus or minus 3.2
m. 2, - 3. 2, respectively
If the two numbers represented by the points m and N on the number axis are opposite to each other, and the distance between the two points is 7.2, then who are the numbers represented by the two points?
If two numbers are opposite to each other, let one be x and the other be - x, and | x | + | - x | = 7.2, then x = 3.6, so these two points are 3.6 and - 3.6
On the number axis, the distance between the N point and the origin is 4 times of the distance between the N point and the corresponding point of the number 30, then the number represented by the N point is
Distance between N point and origin = | n|
The distance between n points and the corresponding point of number 30 = | N-30|
So | n | = 4 * | N-30|
N = 4n-120 or n = 120-4n
N = 40 or 24
On the number axis, if the distance between N point and 0 point is 4 times of the distance between N point and 30 point, then the number represented by N point is______ ．
The answer is: 40
If the distance between the point m on the number axis and the origin is m, then the number represented by the point m is
This is the problem of junior high school
If the distance between the point m on the number axis and the origin is m, then the number represented by the point m is - m or m
On the number axis, there are three numbers a, B and C between minus 7 and 37. Among these five numbers, the distance between each two adjacent numbers is equal. Find the value of a plus B minus C
Insert three numbers between - 7 and 37
There are five numbers, so there are four intervals
37-(-7)=37+7=44
So each interval is 44 / 4 = 11
So these three numbers are a = - 7 + 11 = 4, B = 4 + 11 = 15, C = 15 + 11 = 26
a+b-c=4+15-26=-7
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