algebra help.?

👨🏻‍🏫 學術台數學

[匿名]

2016-06-10 6:33 pm

更新1:

The cube root of a number is between 6 and 7. Which of the following could be the value of that number? A- 217 B-200 C- 350 D- 344

更新2:

i don't get this. I'm doing course recovery. just explain it to me please

回答 (2)

DWRead

2016-06-10 6:45 pm

"The cube root of a number is between 6 and 7"
6 < ∛x < 7

cube the inequality
6³ < x < 7³
216 < x < 343

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Captain Matticus, LandPiratesInc

2016-06-10 6:38 pm

6 < x^(1/3) < 7

Cube everything

6^3 < x < 7^3
216 < x < 343

Which number(s) might be between 216 and 343?

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