如何使五个单位分数的和等于1?请填空1/2+1/()+1/7+1/()+1/42=1

问题描述:

如何使五个单位分数的和等于1?请填空1/2+1/()+1/7+1/()+1/42=1

1/2+1/(6)+1/7+1/(6)+1/42=1