[" 18."f:R rarr R&f(x)=x^(6)-3x^(5)+8x^(...

[" 18."f:R rarr R&f(x)=x^(6)-3x^(5)+8x^(3)+5." Then "f(x)" is - "],[[" (A) injective as well as surjective "," (B) neither injective nor surfective "],[" (C) injective but not surjective "," (D) surjective but not injective "]]

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