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【初中數學公式】
Floor 163
啊啊是谁都对
6/24/13 21:11
144弧長計算公式:L=n兀R/180
Floor 164
啊啊是谁都对
6/24/13 21:11
145扇形面積公式:S扇形=n兀R^2/360=LR/2
Floor 165
啊啊是谁都对
6/24/13 21:11
146內公切線長= d-(R-r) 外公切線長= d-(R+r)
Floor 166
啊啊是谁都对
6/30/13 17:31
http://tieba.baidu.com/p/2424963297
Floor 167
啊啊是谁都对
6/30/13 17:31
乘法與因式分 a2-b2=(a+b)(a-b)
Floor 168
啊啊是谁都对
6/30/13 17:31
a3+b3=(a+b)(a2-ab+b2)
Floor 169
啊啊是谁都对
6/30/13 17:32
a3-b3=(a-b(a2+ab+b2)
Floor 170
啊啊是谁都对
6/30/13 17:32
三角不等式 |a+b|≤|a|+|b|
Floor 171
啊啊是谁都对
6/30/13 17:32
|a-b|≤|a|+|b|
Floor 172
啊啊是谁都对
6/30/13 17:33
|a|≤b<=>-b≤a≤b
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