Dịch: Tìm giá trị nhỏ nhất của \(9x^2-6-6x\)
Ta có: \(9x^2-6-6x=9x^2-6x-6=\left(3x-1\right)^2-7\ge-7\)
Dấu \(''=''\)xảy ra \(\Leftrightarrow\left(3x-1\right)^2=0\Leftrightarrow3x-1=0\Leftrightarrow x=\frac{1}{3}\)
Vậy, Giá trị nhỏ nhất của đa thức \(9x^2-6-6x\) là \(-7\Leftrightarrow x=\frac{1}{3}\)
=> The minimum value of 9x2-6-6x is -7
the minimum value of 9x^2 - 6 - 6x
Exam number 219:12
Fill in the blank with the suitable number (Note: write decimal number with "the dot" between number part and fraction part. Example: 0.5)
Question 1:
Given .
Find the value of "" such that its degree is equal to 4.
Answer: The value of "" is
Question 2:
The value of with is
Question 3:
Given .
The degree of is
Question 4:
Given .
The degree of is
Question 5:
Given .
The value of is
Question 6:
In this figure, if the length of the line segment is an even number.
Then .
Question 7:
Given .
The value of
Question 8:
The value of with is
Question 9:
Given with .
Then the minimum of is
Question 10:
The minimum value of is
Assume that two numbers x and y satisfy: 2x + y = 6.
Find the minimum value of expression A = 4x2 + y2
Find the minimum value of \(S=\left|x+1\right|+\left|x+5\right|+\left|x+14\right|+\left|x+97\right|+\left|x+1920\right|\) ?
For positive real numbers x,y,z so that: x+y+z = 3. Find the minimum value of expression
A = 1/( x^2 + x) + 1/(y^2+ y) +1/( z^2 +z)
Subtract 100 from 7 times of a number A, the difference will be 68 more than 5 times the value of A. Find the value of A.
Answer: The value of A is ........
Subtract 100 from 7 times of a number A, the difference will be 68 more than 5 times the value of A. Find the value of A.
Answer: The value of A is
find the minimum value ò B = (-x-2)4 + 5(x+2)2
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Subtract 100 from 7 times of a number A, the difference will be 68 more than 5 times the value of A. Find the value of A.
Answer: The value of A is ......
