What is the domain for the following expression?

2012-09-19 4:45 am

Is the domain for (x^2-8x)^(1/4)

(-inf,0)U(0,8)U(8,inf)?

it has to be something to do with 0 and 8 but I am not sure.....

回答 (1)

2012-09-19 4:52 am

✔ 最佳答案

Hello !
x² - 8x = x(x - 8) ≠ 0
∴ x ∈ (-∞, 0)∪(0, 8)∪(8, ∞)

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