根号2的2020次方乘以根号2减一的2019次方?

2025-01-19 12:58:26
推荐回答(1个)
回答1:

(√2+1)^2020×(√2一1)^2019
=(√2+1)(√2+1)^2019×(√2一1)^2019
=(√2+1)×[(√2+1)(√2一1)]^2019
=(√2+1)×1
=√2十1。