a 1 4 a a+2 2 2 ÷ 2 a 2a a 4a + 4 a 2a 2 2 a + 2 a 2a a 1 a 2a = 2 × 2 × a 2a 4 a a 4a + 4 4 a
1.解法二: 解法二:
a + 2 a 1 a = = × 4 a a 2 4 a
……
1 = a 2
a 1 4 a a+2 2 2 ÷ 2 a 2a a 4a + 4 a 2a 2 2 a + 2 a 2a a 1 a 2a = 2 × 2 × a 2a 4 a a 4a + 4 4 a
1.解法二: 解法二:
a + 2 a 1 a = = × 4 a a 2 4 a
……
1 = a 2
下一篇:Latex教程