x4 + y4 = 1
squircle forumula
squircle with equal radii of 1 and center at the origin
Category: Math
esoteric math stuff
square root of i
√2 √2 √i = - -- - -- i 2 2 √2 √2 √i = -- + -- i 2 2 fractional exponents
b^m/n = (n√b)^m 8^2/3 = (3√8)^2 = 2 ^2 = 4 27^x = 81 3^3x = 3^4 3x = 4 x = 4/3 27^4/3 = (3√27)^4 = 3^4 = 81 permutations and combinations
how many ways can k items be selected from a pool of n items? permutations: order matters, like prizes
n!--------(n - k)! combinations: order doesn't matter, so divide by the number of redundant results, which is k! n!-------------(n - k)! * k! divisible by 7 process
divisible by 7
5 * last (y) + the rest (x) or the rest (x) - 2 * last (y) 10x + y 50x + 5y = (x + 5y) + 49x 49x is divisible by 7 so only need to test x + 5y x + 5yx - 2y augend 5 addend 2 sum…