已知x+1⼀x=2,求x눀+1⼀x눀,x^4+1⼀x^4的值 过程 急急急急、

2024-12-31 14:18:54
推荐回答(1个)
回答1:

x²+1/x²
=(x+1/x)²-2
=2² -2
=2
x^4+1/x^4
=(x²+1/x²)²-2
=2² -2
=2