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Show that for each n we can find an n-digit number with all its digits odd which is divisible by 5^n.
Assume the a number
can be divided byIn the n+1 case
The fourth one ,
which is not below 0 , so the value of the function will always increase ,such function contains no period.The third one ,
The first one, Let f(x)={x}={x+k} k must equally to any integers, the min period is 1
The second , let f(x)=cot(x+7)=cot(x+7+k) , since the period of cot is
Here a method , assume k are their period. Check out whether the equation F(x)=F(x+k) has a constant solution for k for any x.
It's a group of Equation or just two separate equations?
I thought
then I don't know what to do
For
consider the rational numberWhere
and are positive integers. Prove that if p is an odd prime , then the numberator of is divisible by p.I wanna learn Differential Eq too , That Website totally rocks~ thanks JaneFairfax.
But it only has solutions , I wonder how they found those solutions.Need Proof
speed = wave lengh / period (time)
And I wanna ask you guys are there any math test? I need to prove I am eligible for the university I am about to apply for.
I have been to San Francisco for only 2 month from China , and I haven't finnished high school yet , but I am 18 , 18 can't enter high school in California.I want to go to univeristy by taking test or stuff like that . I major in math and physics . Any good advice about test taking or university recommanding? thanks guys.
let give a percific example , (3.4) is above or below y=5x+6 ? if you assume x=3 then y=5x3+6=21 ,21>4, that means the line is above the point.
Hi , Dan . I am simply just an ameteur , and you are professional , you learn a lot , hope I got the time too lol~~
Oh right , the starting temp , there should be some formula?
Give you a tip , you can divide the v into two v on x-axis and y-axis.
the v on y-axis describe the motion in height , and the x-axis in lenght. Two motion are independent.
Here is my opinion , though I 've never learned about Temp, Pressure, Gas.
If a water particle with 0 deg c encounter with a 100 deg c water particle , they will both become 50 deg c . The mass of the steam is 10 g and the mass of the ice is 50 g , imply that ice has 5 times particle that of the steam. So the final temp should be
in certain shapes , sum of the angles equal to 180d , 270d, ..so on. does this help?
you don't need to get v , you know that v/t=a , from the v=2t , divide both sides by t, you get v/t=2 , thus a=2 , that's it
Okay ,
a is the acceleration , then apply the Newton's law , Thus you get your answerI just looked up some information for you , I haven't seriously learned the expansion.
In Z17, 5^2>17 , therefore the solutions exist only above or equal to 5. Let X be the solution ,
solve this one .Oh...I forgot how to solve this equation....I am sure it can be solved.
I find some information about it but I am not sure how to operate.
As I stated above , all you have to do is to solve
is equivalent to finding a value y such that
This method is called Excludent ,by the way.
yeah, I realize that. , any more effective way?