The 1 / 2 log of comparison size takes a as the base true number, t as the base true number, and log takes 2 as the base true number, which is (T + 1) divided by 2 Compare the size: 1 / 2 log with a as the base, the true number is t, log with 2 as the base, the true number is (T + 1) divided by 2 Compare the size of the two The base number is a.

The 1 / 2 log of comparison size takes a as the base true number, t as the base true number, and log takes 2 as the base true number, which is (T + 1) divided by 2 Compare the size: 1 / 2 log with a as the base, the true number is t, log with 2 as the base, the true number is (T + 1) divided by 2 Compare the size of the two The base number is a.

I only know the case when a = 2
First of all: according to the inequality: T + 1 > = 2 radical T, so (T + 1) / 2 > = radical t
Now it's logarithmic knowledge: 1 / 2log takes a as the base, and the real number T can be written as 1 / 2loga (T) = the square of half of loga (T), because the square of half of T = the root t
So 1 / 2 log a (T) = log a (root T)
After the first step, (T + 1) / 2 > = root t has been calculated
So when a = 2: log2 (root T)

Let a = log take 3 as the base true number is 2, B = logl take 2 as the base true number is 3, C = log take 0.3 as the base true number is 2

3>1
So log3 (x) time increasing function
So 0 = log3 (1)

In rational numbers, there exists ()
A. The smallest rational number B. the smallest integer C. the largest negative number D. the number with the smallest absolute value

In rational numbers, there exists (d)
A. The smallest rational number B. the smallest integer C. the largest negative number D. the number with the smallest absolute value
A can be infinitely small and does not exist
B can be infinitely small, and it doesn't exist
C can be infinitely close to zero and does not exist

There are 1500 chickens and ducks in the farm. There are 100 chickens more than 3 / 5 of ducks. How many chickens and ducks are there

Cancer in July
1500-100 = 1400
Duck: 1400 (1 + 3 / 5) = 875
Chicken: 875 × 3 / 5 + 100 = 625
A: 875 ducks and 625 chickens
Believe me, I did it and I did it right,

Find the range of function f (x) = 0.25 ^ (X & # 178; - 2x + 1 / 2)
Note that the exponent is a quadratic function

X & # 178; - 2x + 1 / 2 = (x-1) &# 178; - 1 / 2 > = - 1 / 2 (1 / 4) ^ (- 1 / 2) = 2
0

1. It is known that a and B satisfy (a + b) & sup2; = 1, (a-b) & sup2; = 25
(1) Find the value of a & sup2; + B & sup2;
(2) Find the value of ab
2. Given A-B = 3, find the value of the polynomial [(a + 2b) & sup2; - (a + b) (3a-b) - 5B & sup2;]
The second question should be to find the value of [(a + 2b) & sup2; - (a + b) (3a-b) - 5B & sup2;] / (2a).

(1)（a+b）²=a²+b²+2ab （a-b）²=a²+b²-2ab （a+b）²+（a-b）²=2(a²+b²)=26 a²+b²=13 （a+b）²-a²+b²=2ab=-12 ab...

General term formula of sequence 1,9,73

Let the sequence be {an}
a1=1³+0³=(2^0)³+(2^0 -1)³
a2=9=2³+1³=(2^1)³+(2^1 -1)³
a3=73=4³+3³=(2²)³+(2²-1)³
…………
Rule: starting from the first term, each term is equal to the cube of the number of terms of 2 to the power of - 1, plus the lie cube of the difference of the number of terms of 2 to the power of - 1 minus 1
The nth term an = [2 ^ (n-1)] ³ + [2 ^ (n-1) - 1] ³

What are the reciprocal of minus 0.5, seven thirds and eleven quarters?

-5 = - 1 / 2, the reciprocal is negative two
The reciprocal of 7 / 3 is 3 / 7
-The reciprocal of 11 / 4 is negative 4 / 11

The formula of linear equation with one variable

First of all, the unknowns must be clear, and it will not be difficult in the future. According to the conditions, and their own set of unknowns out of the equation, some problems need to use the unknowns several times, that is an empirical problem. Come on! I believe you can learn it well! These methods just play a transitional role, really learn the equation does not need

Write the numbers in line 20 and column 21,
First column second column third column fourth column fifth column
First line 1 2 5 10 17
The second line 4 3 6 11 18
The third line 9 8 7 12 19
The fourth line 16 15 14 13 20
The fifth line 25 24 23 22 21

400 is in line 20, column 1
401 is in line 1, column 21
402 is in line 2, column 21
……
420 in line 20, column 21