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If x is a positive real number such that x2 = 16, then x3 + √x = ?
- a)18
- b)20
- c)66
- d)68
- e)74
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
If x is a positive real number such that x2 = 16, then x3 + √x =...
The correct answer is c. To find what x3 + x equals, you need to first solve x2 = 16 for x.
The solution is the square root of 16, which is 4. Then substituting into the original expression, you get y3 + √4. This expression simplifies to 64 + 2, or 66.
The solution is the square root of 16, which is 4. Then substituting into the original expression, you get y3 + √4. This expression simplifies to 64 + 2, or 66.
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If x is a positive real number such that x2 = 16, then x3 + √x = ?a)18b)20c)66d)68e)74Correct answer is option 'C'. Can you explain this answer?
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