WebNote that he is allowing cubes to be positive, negative, or zero: Is every number the sum of four cubes? This has been proved for all numbers except possibly those of the form $9n \pm 4$ Part 1: $$ 6n = (n+1)^3 + (n-1)^3 - n^3 - n^3 $$ WebApr 28, 2024 · Let's just count how many cube faces are exposed.. 8 on the front, 8 on the back. 3 on the left side, 3 on the right side. 3 on the top, 3 on the bottom. 4 in the middle . That is a total of 8 + 8 + 3 + 3 + 3 + 3 + 4 = 32 exposed cube faces. Each cube face has an area of 3 cm * 3 cm = 9 cm 2. So.. the total surface area of this shape = 32 * 9 ...
Can any integer can be written as the sum of 8 integer cubes?
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View question - Eight cubes form the figure shown.
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