1/14=1/28+1/28
设1/14=1/a+1/b
则ab=14(a+b)
ab-14a=14b
a(b-14)=14b-14*14+14*14
(a-14)(b-14)=14*14=196
196=1*196=2*98=4*49=7*28=14*14
1/14=1/15+1/210=1/16+1/112=1/18+1/63=1/21+1/42=1/28+1/28
1/14=1/28+1/28
设1/14=1/a+1/b
则ab=14(a+b)
ab-14a=14b
a(b-14)=14b-14*14+14*14
(a-14)(b-14)=14*14=196
196=1*196=2*98=4*49=7*28=14*14
1/14=1/15+1/210=1/16+1/112=1/18+1/63=1/21+1/42=1/28+1/28