A 1 = B 1 > 0, a 3 = B 3 > 0, a 3 is not equal to B 3, then a 5 and B 5 are related in size

A 1 = B 1 > 0, a 3 = B 3 > 0, a 3 is not equal to B 3, then a 5 and B 5 are related in size

a1+a5=2a3,a5=2a3-a1;
b1*b5=b3^2,b5=b3^2/b1;
And A1 = B1 > 0, A3 = B3 > 0, A1 is not equal to A3
a5-b5=2a3-a1-b3^2/b1
=2a3-a1-a3^2/a1
=（2a3a1-a1^2-a3^2）/a1
=-（a1-a3）^2/a1
What is the power of 0 in mathematics? What is the power of 1 in mathematics?
The first one seems meaningless, just like 1 / 0
The second is equal to 0
Mathematically, 0 to the power of 0 equals 0? 0 to the power of 1 equals 0
Mathematically, the nth power of 0 is equal to 0
non-existent
Because the power 0 of 2 equals 1, the power 0 of 3 equals 1, and the power 4 equals 1,
So 0 to the power of 0 equals 1
The power 0 of 0 is meaningless. From the definition of real number, this kind of operation is not allowed. The power 1 is zero
The power of 0 is 1, the power of 0 is meaningless
4. The distance between a and B is 360 kilometers. A freight car and a passenger car leave from a and B at the same time. It is known that the speed of the passenger car is 50 kilometers per hour. The speed of the freight car is the same as that of the passenger car. How many hours after they leave, do they meet?
6. On a map with a scale of 1:6000000, the distance between a and B is 2cm. Can a car with a speed of 50km / h start from place a at 8:30 in the morning and reach place B at 11:00 at noon?
The first question is incomplete
The answer to the second question is yes
The social sequence {an} is an arithmetic sequence, BN = (1 / 2) a power n, and B1 plus B2 plus B3 = 21 / 8, B1 multiplied by B2 plus B3 = 1 / 8, to find an
Let {an}: an = a1 + (n-1) d; then BN = (1 / 2) ^ an; B1 + B2 + B3 = (1 / 2) ^ A1 [1 + (1 / 2) ^ D + (1 / 2) ^ (2D)] = 21 / 8; b1b2b3 = (1 / 8) ^ (a1 + D) = 1 / 8; = = > d = 2, A1 = - 1; = = > an = - 1 + 2 (n-1) = 2n - 3
What is the power of a to the x power of B,
For example: how much power of 5 to the 8th is equal to 3? How to calculate? What formula is available?
I know the logarithm, but my method can only solve the problem that the x power of a is equal to y, so I can get x, but I can't do anything in this case.
a^x=b^y y=?
If B ^ y = N.Y = logbn
So, if a ^ x = B ^ y = logba ^ x = xlogba
5^8=3^y y=log35^8=8log35
Verification: 3 ^ y = 3 ^ 8log35 = (3 ^ log35) ^ 8 = 5 ^ 8
X power of a = y power of B
The B power of a is equal to the LNC (a ^ b) power of C
Use logarithm to solve.
This method is similar. For example, let the x power of a be equal to m, then the (y) power of 10 is equal to m, then y = log M. you can look at the logarithmic function
The distance between a and B is 360 kilometers. A freight car and a passenger car run from a and B at the same time. They meet at 3 o'clock. It is known that the speed ratio of the passenger car to the freight car is 5 to 7 tons?
Bus speed (360 / 3) * 5 / (5 + 7) = 50 km / h
Speed of freight car (360 / 3) * 7 / (5 + 7) = 70 km / h
It's the speed of car a and B, right
If the speed of car a is 5x, and the speed of car B is 7x, there are:
5X+7X=360
X=30
So car a is 5 * 30 = 150 km / h
Vehicle B is 7 * 30 = 210 km / h. The distance between Party A and Party B is 360 km. A freight car and a passenger car run from Party A and Party B at the same time. They meet at 3 o'clock. It is known that the speed ratio of the passenger car to the freight car is 5 to 7 tons. How many meters does the passenger car and the freight car run? Well, meet in three hours, this simple point is 360 / 3 = 120 speed ratio... Expand
It's the speed of car a and B, right
If the speed of car a is 5x, and the speed of car B is 7x, there are:
5X+7X=360
X=30
So car a is 5 * 30 = 150 km / h
Car B is 7 * 30 = 210 km / h. question: the distance between a and B is 360 km. A freight car and a passenger car run from a and B at the same time. They meet at 3 o'clock. It is known that the speed ratio of the passenger car to the freight car is 5 to 7 tons. How many meters does the passenger car and the freight car run?
Let {an} be an arithmetic sequence, {BN} = (1 / 2) to the power of an, and B1 + B2 + B3 = 21 / 8, B1 * B1 * B3 = 1 / 8, find an
Let the tolerance be d
(1/2)^(a1+a2+a3)=1/8
a1+a2+a3=3
a2=1
b2=1/2
b1+b2+b3=21/8
(1/2)^(1-d)+(1/2)^(1+d)=17/8
The solution is d = 2, A1 = - 1
∴an=2n-3
Love mathematics multiply by 4, how to be equal to good love of learning numbers
“yymyl2008”：
2178×4=8721
Love = 2
Good = 1
Number = 7
Learning = 8
Good luck and goodbye
The distance between a and B is 1410 km. A freight car starts from station a to station B, and a passenger car starts from station a to station a in 4 hours. The passenger car starts from station a in 9 hours
How many kilometers does a truck travel per hour and a bus travel per hour?
The speed of the bus is v km / h
9v + 60×13 = 1410
9v = 630
V = 70 km / h
When they met, the truck drove for 4 + 9 = 13 hours, the bus for 9 hours, and the two cars traveled a total of 1410 km
(1410-60*13)/9=70
Suppose: the bus travels χ km per hour
60*（4+9）=1410-9χ
The solution is χ = 70
So the bus travels 70 kilometers per hour
Let an be an arithmetic sequence, BN = one half of an power, B1 + B2 + B3 = 21 / 8, B1 × B2 × B3 = 1 / 8, and find the general term an!
∵ BN = (1 / 2) ^ an ∵ b1b2b3 = (1 / 2) ^ (a1 + A2 + a3) = 1 / 8 ∵ a1 + A2 + a3 = 3 ∵ (an) is an arithmetic sequence ∵ a1 + a3 = 2A2 ∵ 3a2 = 3, A2 = 1 ∵ B2 = (1 / 2) ^ 1 = 1 / 2 ∵ B1 + B2 + B3 = 21 / 8, b1b2b3 = 1 / 8, ∵ B1 + B3 = 17 / 8, b1b3 = 1 / 4 ∵ let B1 and B3 be equations 8x-17