The function f is defined by f(x) = √x – 10 for all positive numbers x. If u = f(t) for some positive numbers t and u. What is t in terms of u?⼼_出国考试答疑器_GMAT_试题

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题目：

The function f is defined by f(x) = √x – 10 for all positive numbers x. If u = f(t) for some positive numbers t and u. What is t in terms of u?

⼼

选项:

A、√(u+10)

B、(√u + 10)²

C、√(u²+10)

D、(u + 10)²

E、(u² + 10)²

答案:

D

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