請(qǐng)給出具體解答過程
熱心網(wǎng)友
缺少符號(hào)吧c=xy/x+y對(duì)嗎ac=1/x*xy/x+y=y/x+ybc=1/y*xy/x+y=x/x+yac+bc=1
熱心網(wǎng)友
ac+bc=1/x×〔xy/x+y〕+1/y×〔xy/x+y〕 =〔1/x+1/y〕×〔xy/x+y〕 =〔x+y/xy〕×〔xy/x+y〕 =1
熱心網(wǎng)友
1c=1/(a+b)
請(qǐng)給出具體解答過程
缺少符號(hào)吧c=xy/x+y對(duì)嗎ac=1/x*xy/x+y=y/x+ybc=1/y*xy/x+y=x/x+yac+bc=1
ac+bc=1/x×〔xy/x+y〕+1/y×〔xy/x+y〕 =〔1/x+1/y〕×〔xy/x+y〕 =〔x+y/xy〕×〔xy/x+y〕 =1
1c=1/(a+b)