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[" If "(15)/(4)" .For real "x" ,let "f(x)=x^(3)+5x+1" ,then - "],[[" What "," (B) "f" is "R" is ont not one - one "],[" (C) "" Is a cone and onto "R," (D) "f" is neither one - one nor onto "R],[" (3."" Let "f(x)=(x+1)^(2)-1,xz-1]," [AIEEE "2009],[" che ",y=4x+3]

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For real x, let f(x)""=""x^3+""5x""+""1 , then (1) f is oneone but not onto R (2) f is onto R but not oneone (3) f is oneone and onto R (4) f is neither oneone nor onto R

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