[最も人気のある！] a^3+b^3 220901-A 3 b 3 formula derivation
Here is animated view of formula Cube of a sum =(ab)³=a³3a²b3ab²b³ You can see both cubes and the six rectangular parallelepipeds in 3Dview Cube of a difference The formula is (ab)³=a³3a²b3ab²b³ You convert it to (ab)³=a³3ab(ab)bA = 2 b = 3 So, when you do a, b = b, a b what happens is you create the tuple (b, a b) or (3, 5) and then unpack it into a and b so a becomes 3 and b becomes 5 In your second example a = b # a is now 3 b = a b # b is 3 3, or 6A 3 b 3 c 3 − 3abc = (a b c) (a 2 b 2 c 2 − ab − bc − ac) If (a b c) = 0, a 3 b 3 c 3 = 3abc Some not so Common Formulas Power n Formula a n − b n = (a − b) (a Binomial Theorem A 3 b 3 formula derivation
