自然数a、b、c、d满足1/a^2+1/b^2+1/c^2+1/d^2=1则1/a^3+1/b^4+1/c^5+1/d^6的值为马上啊

Question

自然数a、b、c、d满足1/a^2+1/b^2+1/c^2+1/d^2=1则1/a^3+1/b^4+1/c^5+1/d^6的值为
马上啊

Answer 1

特值法：abcd都是2,后面的自己算!