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Define f: R R by f(x) = x 2 . Is f onto? (1) Yes (2) No

Let A = {1,2,3,4} and B = {a,b,c}. Define the relation f from A to B by f = {(1,b), (2,a), (3,c), (4,b)}. Is f a function? (1) Yes (2) No. Let A = {1,2,3,4} and B = {a,b,c}. Define the relation f from A to B by f = {(1,b), (2,a), (3,c), (4,b)}.

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Define f: R R by f(x) = x 2 . Is f onto? (1) Yes (2) No

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  1. Let A = {1,2,3,4} and B = {a,b,c}. Define the relation f from A to B by f = {(1,b), (2,a), (3,c), (4,b)}. Is f a function? (1) Yes (2) No

  2. Let A = {1,2,3,4} and B = {a,b,c}. Define the relation f from A to B by f = {(1,b), (2,a), (3,c), (4,b)}. Is f onto? (1) Yes (2) No

  3. Define f: RR by f(x) = x2. Is f onto? (1) Yes (2) No

  4. Define f: ZZ by f(x) = x + 2. Is f onto? (1) Yes (2) No

  5. Define f: RR by f(x) = [x]. Is f onto? (1) Yes (2) No

  6. Define f: RZ by f(x) = [x]. Is f onto? (1) Yes (2) No

  7. Define f: R´RR by f(x,y) = x  y. (f is the multiplication function). Is f onto? (1) Yes (2) No

  8. Define f: RR´R by f(x) = (x, 2x). Is f onto? (1) Yes (2) No

  9. Let A = {1,2,3,4} and B = {a,b,c}. Define the relation f from A to B by f = {(1,b), (2,a), (3,c), (4,b)}. Is f one-to-one? (1) Yes (2) No

  10. Define f: RR by f(x) = x2. Is f one-to-one? (1) Yes (2) No

  11. Define f: ZZ by f(x) = x + 2. Is f one-to-one? (1) Yes (2) No

  12. Define f: RZ by f(x) = [x]. Is f one-to-one? (1) Yes (2) No

  13. Define f: R´RR by f(x,y) = x  y. (f is the multiplication function). Is f one-to-one? (1) Yes (2) No

  14. Define f: RR´R by f(x) = (x, 2x). Is f one-to-one? (1) Yes (2) No

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