Given that ax + by equals 5bx + ay equals 2, the solution of the system is x equals 4Y equals 3, then the value of 3a-b of 2A + B is

Given that ax + by equals 5bx + ay equals 2, the solution of the system is x equals 4Y equals 3, then the value of 3a-b of 2A + B is

ax+by=5
Is the solution of BX + ay = 2 x = 4 y = 3 this problem?
If so, we can directly substitute x = 4, y = 3 into the system of equations about a and B
4a+3b=5
4b+3a=2
The values of a and B can be obtained directly
a=2 b=-1
You can get the answer you want

If the solution of the system x = 3 ax + by = 5 is the same as that of the system y = 4 BX + ay = 2, then the values of a and B are
If the solution of the system x = 3 ax + by = 5 is the same as that of the system y = 4 BX + ay = 2, then the values of a and B are

If the solution of the system of equations x = 3 ax + by = 5 is the same as that of the system of equations y = 4 BX + ay = 2, then x = 3 and y = 4 conform to the two systems at the same time, that is, 3A + 4B = 5, 1, 3b + 4A = 2, 2 form a system of equations, 1 is multiplied by 3, 9A + 12b = 15, 3 is multiplied by 4, 16a + 12b = 8, 4 is subtracted by 3, 7a = - 7a = - 1 generation

Given that the function f (x) = 1 / (3 ^ x + 1) + A, (a ∈ R) is an odd function, find the value of A

a=-1/2
f(-x)=1/(3^-x+1)+a=3^x/(3^x+1)+a
It is known that f (x) = 1 / (3 ^ x + 1) + A, (a ∈ R) is an odd function
3^x/(3^x+1)+a=-[1/(3^x+1)+a]
The solution is a = - 1 / 2

81.( ).49.( ).25.( ).( ).( ).1

81.(64 ).49.( 36).25.( 16).(9 ).(4 ).1
They are the squares of 9, 8, 7, 6, 5, 4, 3, 2 and 1

There are eight natural numbers in a row. Starting from the third number, each number is equal to the sum of the two numbers in front of it?
Why is the fourth number 2x + 4? Why is the fifth number 3x + 2 * 4?

It can be found that the first number is 4; the second number is x; the third number is x + 4; and the fourth number is 2x + 4. So starting with the third number, the following rule will appear: the coefficient of 4 and X in the number is also additive. For example, the fifth number is 3x + 2 * 4; so the eighth number is. 13X + 8 * 4 = 2008, and the solution is x = 152, that is, the second number is 152

If [K + 2] X & # 178; + KX + 21 = 0 is a linear equation with one variable, then K=

-2

Find the rules and fill in the blanks
(1) 9, 3, 1, 1 / 3, ()
(2) 8, 2, (), 1 / 8, 1 / 32
(3) 3 out of 9, 4 out of 12, 5 out of 15, 6 out of 18, ()
(4) 1, 1 / 2, 2 / 2, 1 / 3, 3 / 2, (), ()
(5) 6 out of 7, 2 out of 7, 2 out of 21, (), 2 out of 189, ()
All brackets are required

(1) 9,3,1,1 / 3, (1 / 9)
(2) 8, 2, (1 / 2), 1 / 8, 1 / 32
(3) 3 / 9, 4 / 12, 5 / 15, 6 / 18, (7 / 21)
(4) 1, 1 / 2, 2 / 2, 1 / 3, 3 / 2, (4), (2)
(5) 6 out of 7, 2 out of 7, 2 out of 21, (2 / 63), 2 out of 189, (2 / 567)

In natural numbers less than 20, prime numbers that are not odd numbers have () and composite numbers that are even numbers have ()（

In the natural numbers less than 20, the prime numbers that are not odd are (2), and the composite numbers that are even are (4,6,8,10,12,14,16,18,20)?

What is the fourth root of 16

The fourth root of 16 = ± 2

DSPLY:MOV DPTR , #TABLE
MOVC A, @A+DPTR
MOV SBUF, A
JNB TI, $
CLR TI
RET
TABLE:DB 0C0H ,0F9H,0A4H
DB 0B0H,99H,92H
DB 82H,0F8H,80H,90H
Question:
1. What does MOVC a, @ a + dptr mean?
2. What does a + in MOVC a, @ a + dptr mean?
3. What does "table" mean?