Log 3 is the logarithm of the bottom 2 / 3. Can we calculate the specific number?

Log 3 is the logarithm of the bottom 2 / 3. Can we calculate the specific number?

This is the simplest
Only approximate values can be obtained
log3(1.5)
=lg1.5÷lg3
=0.3691
1. The following functions are linear functions, but not positive proportional functions are () a, y = - X / 2 B, y = - 2 / X C, y = - X-1 / 2
C
C、y=- x-1/2
C
B
Log is based on 2, the logarithm of x = 0, X=
The logarithm is 0 and the true number is 1
So the answer is 1
The function y = (|a|– 3) x & #178; + 2 (a – 3) x is a positive proportional function about X. find the analytic expression of the function
Since it is a positive proportional function, the coefficient of quadratic term should be 0, so a is positive and negative 3, but the coefficient of primary term cannot be 0, so a is negative 3, so the analytical formula is y = - 12x
How to compare the size of logarithm, such as log (2) 5 and log (3) 8
log2(5)>log2(4)=2
log3(8)log3(8)
Log (2) 5 is greater than log (3) 8
1. Among the following functions, the first-order functions are: ① y = - 5x; ② y + - 2 / X; ③ y = - 3x & # 178;; ④ y = 8; ⑤ y = 9x-6
A、①⑤ B、①④⑤ C、②③ D、②④⑤
2. If the image of a function of degree passes through points (0,1) and (- 1,3), then the analytic expression of the function is______
3. A linear function y = KX + K, no matter what non-zero real number k takes, the function image must pass through the point______
4. The analytic formula of the line passing through the point (2,0) and surrounded by the coordinate axis with the triangle area of 2____
5. If the line y = KX + B is parallel to the line y = - 2x and intersects with another line y = x + 3 at a point on the Y axis, then the analytical formula of the line is given_______
1. Among the following functions, the first-order functions are: ① y = - 5x; ② y = - 2 / X; ③ y = - 3x & # 178;; ④ y = 8; ⑤ y = 9x-6
A、①⑤ B、①④⑤ C、②③ D、②④⑤
Choose B
2. If the image of a function passes through points (0,1) and (- 1,3), then the analytic expression of the function is___ y=-2x+1___
3. A linear function y = KX + K, no matter what non-zero real number k takes, the function image must pass through the point__ (-1,0)____
4. The analytic formula of the line passing through the point (2,0) and surrounded by the coordinate axis with the triangle area of 2_ y=-x+2_ Or y = X-2__ 5. If the line y = KX + B is parallel to the line y = - 2x and intersects with another line y = x + 3 at a point on the Y axis, then the analytical formula of the line is given__ y=-2x+3_____
1、A
2、y=-2x+1
3、(-1,0)
4、y=x+2 y=-x-2
5、y=-2x+3
What is the power of 2 equal to 1000
log(2)1000=3+log(2)125
The following functions are: 1. Y = - 3x + 4 2. Y = 7 / 5x 3. Y = 1 + 2 / x 4. Y = x & # 178; + 25. Y = X-1 / 2, where is a linear function?
1,2,5
1,5 if 2 is seven fifths, X is a function of degree, if it is seven fifths, it is not
1、5
Given that the logarithm of the function y = log (A-1) as the base (x + b) passes through points (0,1) and (6,2), the value of a and B can be obtained
solution
Over point (0,1) (6,2)
Qi
log(a-1)(0+b)=1
∴a-1=0+b
That is, B = A-1
log(a-1)(6+b)=2
∴(a-1)²=(6+b)
∴a²-2a+1=6+b
∴a²-2a+1=6+a-1
That is a & # 178; - 3a-4 = 0
∴(a-4)(a+1)=0
A = 4, a = - 1 (rounding off)
∴b=3
In the functions of variables y and X (1) y = - 3x; 2) y = 3x + 4; 3) y = 2 / X; 4) the square of y = 2x + 5x - 2. (1) the positive proportion function has (fill in the serial number)
(2) Linear function has (fill in serial number)
1) The positive proportion function has (fill in the serial number) ① y = - 3x
(2) The linear functions are: 1. Y = - 3x; 2. Y = 3x + 4; 4;
（1）①
（2）①;②