A Soviet Scientist who invented Diffusion Welding/Bonding
A very good try, but f(n) is still ambiguous. I assume you mean f(n) = 1/2*n*(n+2) and not 1/[2*n*(n+2)] Then f(n+2) - f(n) = 1/2*(n+2)*(n+2+2) - 1/2*n*(n+2) = 1/2*(n+2)*(n+4) - 1/2*n*(n+2) = 1/2*(n+2)*{(n + 4) - n} = 1/2*(n+2)*4 = 2*(n+2)
F(n) = 4n
A friend in need is a friend you avoid.
1.What is the formula for a proportionp = n / f2. p = (f / 100) * n3. p = f / n4. p = (f / n) * 100
Perfect squares have an odd number of factors. If f is a factor of N, then so is N/f. (For example, 3 is a factor of 30, and so is 10). Thus, it seems factors come in pairs, and there should always be an even number of them. But if f = N/f, then these two factors are the same, resulting in an odd number of factors. For example, 3 is a factor of 9, and it's "mate" is also 3. So for the numbers with an odd number of factors, there is some f where f=N/f. Multiplying both sides by f, we have f^2 = N. So this happens when N is a perfect square.
Aleksey Kazakov was born in 1976.
Ludmil Kazakov is 5' 10".
Matvey Kazakov was born in 1738.
Matvey Kazakov died in 1812.
Rustam Kazakov was born in 1947.
Vladimir Kazakov was born on 1970-11-26.
Sergey Kazakov was born on 1976-07-08.
Konstantin Kazakov was born on 1984-01-19.
Vasily Kazakov was born on 1898-07-18.
Vasily Kazakov died on 1968-05-25.
Artyom Kazakov was born on 1990-05-26.
Alexander Kazakov died on 1919-08-01.