Question

地球和地球仪：例如给一个图,怎么判断是南极还是北极,在这个图内,东西半球,经纬度又怎么看?还有给你几个点,说谁在谁的哪个

Answer 1

a²+b²-6ab=0

a²+b²=6ab

[(a+b)/(b-a)]²

=(a+b)²/(b-a)²

=(a²+2ab+b²)/(a²-2ab+b²)

=(6ab+2ab)/(6ab-2ab)

=8ab/(4ab)

=2

∵a>b>0

∴(a+b)/(b-a)