The minimum value of the function y=√(x2-2x+5)+√(x2+4) is ( ). (A)4. (B)3√2. (C)2√5. (D)

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The minimum value of the function y=√(x2-2x+5)+√(x2+4) is ( ).

(A)4.

(B)3√2.

(C)2√5.

(D)√17.

参考答案:

参考答案D