化简5×920的结果是（）A.32B.32C.523D.152

Question

化简

√(5)×√((9)/(20))的结果是（　　）

A.

(3)/(2)

B.

(√(3))/(2)

C.

(5)/(2)√(3)

D.

(15)/(2)

化简

√(5)×√((9)/(20))的结果是（　　）

√(5)×√((9)/(20))的结果是（　　）√(5)

5

5

5√((9)/(20))

(9)/(20)

(9)/(20)

(9)/(20)(9)/(20)920992020

A.

(3)/(2)

(3)/(2)(3)/(2)323322

B.

(√(3))/(2)

(√(3))/(2)(√(3))/(2)√(3)2√(3)√(3)√(3)

3

3

322

C.

(5)/(2)√(3)

(5)/(2)√(3)(5)/(2)525522√(3)

3

3

3

D.

(15)/(2)

(15)/(2)(15)/(2)152151522

Answer 1

原式=√((9)/(4))=(3)/(2)．
故选A． √((9)/(4))

(9)/(4)

(9)/(4)

(9)/(4)(9)/(4)94999444=(3)/(2)．
故选A． (3)/(2)32333222．
故选A．