Suppose V1=＜R,+＞,V2=＜R, .＞,where R is the set of real numbers, +and . are respectively addition and multiplication. Let f: R→R a

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问题 Suppose V1=＜R,+＞,V2=＜R, .＞,where R is the set of real numbers, +and . are respectively addition and multiplication. Let f: R→R and {(x) = 10x, which of the following propositions is true? ( )

选项 A、f is an injective homomorphism from V1 to V2
B、f is a surjective homomorphism from V1 to V2
C、f is an isomorphism from V1 to V2
D、none of the above

答案A

解析

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