A(-3)且AB=5求B?

2015-10-02 1:14 pm
A(-3)且AB=5求B

回答 (1)

2015-10-02 5:15 pm
設 B(x)。

AB = 5
x - (-3) = 5 或 (-3) - x = 5
x + 3 = 5 或 -3 - x = 5
x = 5 - 3 或 -x = 5 + 3
x = 2 或 -x = 8
x = 2 或 x = -8

答案: B(2) 或 B(-8)


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