The minimum value of the function y=√(x2-2x+5)+√(x2+4) is ( ).(A)4.(B)3√2.(C)2√5.(D)√17.
题目
The minimum value of the function y=√(x2-2x+5)+√(x2+4) is ( ).
(A)4.
(B)3√2.
(C)2√5.
(D)√17.
The minimum value of the function y=√(x2-2x+5)+√(x2+4) is ( ).
(A)4.
(B)3√2.
(C)2√5.
(D)√17.