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#ed_op#DIV#ed_cl#標上電阻慣用的標號 (R1,R2..) , 如下圖.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#&nbsp;#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#IMG alt="image file name: 2k4083c0f14e.png" src="http://yll.loxa.edu.tw/phpBB2/richedit/upload/2k4083c0f14e.png" border=0#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#&nbsp;#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#你要求的 Rt, 應是指對 V1 兩端.#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#&nbsp;#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#R1 + R4 = 2#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#2 // R2 = 2 // 1 (你可以目視為 2 // (2/2) = (1個2)//(2個2並聯) = 3個2並聯) = 2/3#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#&nbsp;#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#(2/3) + R5 = (2/3) + 1 = 5/3#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#(5/3) // R3 = (5/3) // 1 (這裡可以目視為 (5/3) // (5/5) = (3個5並聯)//(5個5並聯) = 8個5並聯) = 5/8#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#&nbsp;#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl#5/8 + 1 = (8+5)/8 = 13/8#ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl##ed_op#DIV#ed_cl##ed_op#/DIV#ed_cl#
Rt=11/7

1+1=2
1/2+1/1=3/2  取倒數 2/3
2/3+1=5/3
3/5+1/1=8/5  取倒數 5/8
5/8+1=13/8 ----答

(每一個電阻都是一歐姆)