]Respuesta : Explicación paso a paso : vertices de la caja(5, 6, 7) ( - 3, 6, 7) (5, - 2, 7) (5, 6, - 1) ( - 3, - 2, - 1) (5, - 2, - 1) ( - 3, 6, - 1) ( - 3, - 2, 7) Radio de una bola : r1) Centro de la bola central : (1, 2, 3) 2) El centro de la bola que toca las caras de vertice (5, 6, 7) es : (5 - r, 6 - r, 7 - r) Entre bolas 1) y 2) hay distancia de 2r.
<img src="https://tex.z-dn.net/?f=%285-r-1%29%5E%7B2%7D%20%2B%286-r-2%29%5E%7B2%7D%20%2B%287-r-3%29%5E%7B2%7D%20%3D%282r%29%5E%7B2%7D" /><img src="https://tex.z-dn.net/?f=3%284-r%29%5E%7B2%7D%20%3D4r%5E%7B2%7D" /><img src="https://tex.z-dn.net/?f=3%2816-8r%2Br%5E2%29%20%3D%204r%5E2" /><img src="https://tex.z-dn.net/?f=r%5E2%20%2B%2024r%20-%2048%20%3D%200" /><img src="https://tex.z-dn.net/?f=r%3D%5Cfrac%7B-24%2B-%5Csqrt%7B24%5E%7B2%7D%20-4%281%29%28-48%7D%7D%7B2%281%29%7D" /><img src="https://tex.z-dn.net/?f=r%3D%5Cfrac%7B-24%2B-%5Csqrt%7B768%7D%20%7D%7B2%7D" /><img src="https://tex.z-dn.net/?f=r%3D-12%2B-8%5Csqrt%7B3%7D" />valor positivo del radio<img src="https://tex.z-dn.net/?f=r%3D-12%2B8%5Csqrt%7B3%7D" />Centro de cada esfera<img src="https://tex.z-dn.net/?f=%285-r%2C%206-r%2C7-r%29%3D%285%2B12-8%5Csqrt%7B3%7D%2C%206%2B12-8%5Csqrt%7B3%7D%2C7%2B12-8%5Csqrt%7B3%7D%29%3D%20%2817-8%5Csqrt%7B3%7D%2C%2018-8%5Csqrt%7B3%7D%2C19-8%5Csqrt%7B3%7D%29" /><img src="https://tex.z-dn.net/?f=%28-3%2Br%2C%206-r%2C7-r%29%3D%28-3-12%2B8%5Csqrt%7B3%7D%2C%206%2B12-8%5Csqrt%7B3%7D%2C7%2B12-8%5Csqrt%7B3%7D%29%3D%20%28-15%2B8%5Csqrt%7B3%7D%20%2C%2018-8%5Csqrt%7B3%7D%2C19-8%5Csqrt%7B3%7D%29" />[img = 10][img = 11][img = 12][img = 13][img = 14][img = 15](1, 2, 3)radio al cuadrado[img = 16] Ecuaciones de cada esfera : [img = 17][img = 18][img = 19][img = 20][img = 21][img = 22][img = 23][img = 24][img = 25].