What is the domain for square root(7-8x)?

MandM

2012-09-18 12:04 am

Is it [7/8,inf)?

回答 (1)

[匿名]

2012-09-18 12:06 am

✔ 最佳答案

Close. It's the other way
(-∞, 7/8]

7 - 8x ≥ 0
7 ≥ 8x
7/8 ≥ x

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