Question

八下又是一道数学题.这题是答案唯一略过的.没办法.

Answer 1

由b+1/c=1,得：b=1-1/c=(c-1)/c,则1/b=c/(c-1),由c+1/a=1,得：1/a=1-c,则a=1/(1-c),

所以 ab+1/b=a+1/b =1/(1-c)+c/(c-1) =1/(1-c)-c/(1-c) =(1-c)/(1-c) =1