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已知10x=3,10y=4,则102x+3y=()A.574B.575C.576D.577

题目详情
已知10 x =3,10 y =4,则10 2x+3y =(  )
A.574 B.575 C.576 D.577
已知10 x =3,10 y =4,则10 2x+3y =(  )
A.574 B.575 C.576 D.577
已知10 x =3,10 y =4,则10 2x+3y =(  )
A.574 B.575 C.576 D.577
已知10 x =3,10 y =4,则10 2x+3y =(  )
A.574 B.575 C.576 D.577
已知10 x =3,10 y =4,则10 2x+3y =(  )
A.574 B.575 C.576 D.577
x y 2x+3y
A.574 B.575 C.576 D.577
A.574 B.575 C.576 D.577 A.574 B.575 C.576 D.577 A.574 B.575 C.576 D.577
▼优质解答
答案和解析
10 2x+3y =(10 x 2 •(10 y 3 =3 2 ×4 3 =9×64=576.
故选C.
10 2x+3y =(10 x 2 •(10 y 3 =3 2 ×4 3 =9×64=576.
故选C. 10 2x+3y =(10 x 2 •(10 y 3 =3 2 ×4 3 =9×64=576.
故选C. 10 2x+3y =(10 x 2 •(10 y 3 =3 2 ×4 3 =9×64=576.
故选C. 10 2x+3y 2x+3y =(10 x x ) 2 2 •(10 y y ) 3 3 =3 2 2 ×4 3 3 =9×64=576.
故选C.