How many of the following are functions ? (i) f(x) = x5;{−1,0,1}→{

1.	How many of the following are functions ? (i) f(x) = x5;{−1,0,1}→{0,1,2} (ii) f(x) = ∓√x;{0,4,9}→{0,2,−2,3,−3} (iii) f(x) = √x;{0,4,9}→{0,2,−2,3,−3} (iv) f(x) = x2;{0,1,2}→{0,1,2,3,4}
Answer» How many of the following are functions ? (i) f(x) = $x^{5}; {- 1, 0, 1} \to {0, 1, 2}$ (ii) f(x) = $\mp \sqrt{x}; {0, 4, 9} \to {0, 2, - 2, 3, - 3}$ (iii) f(x) = $\sqrt{x}; {0, 4, 9} \to {0, 2, - 2, 3, - 3}$ (iv) f(x) = $x^{2}; {0, 1, 2} \to {0, 1, 2, 3, 4}$

How many of the following are functions ? (i) f(x) = x5;{−1,0,1}→{0,1,2} (ii) f(x) = ∓√x;{0,4,9}→{0,2,−2,3,−3} (iii) f(x) = √x;{0,4,9}→{0,2,−2,3,−3} (iv) f(x) = x2;{0,1,2}→{0,1,2,3,4}

Answer»

How many of the following are functions ?

(i) f(x) = $x^{5}; {- 1, 0, 1} \to {0, 1, 2}$

(ii) f(x) = $\mp \sqrt{x}; {0, 4, 9} \to {0, 2, - 2, 3, - 3}$

(iii) f(x) = $\sqrt{x}; {0, 4, 9} \to {0, 2, - 2, 3, - 3}$

(iv) f(x) = $x^{2}; {0, 1, 2} \to {0, 1, 2, 3, 4}$