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Answer Key 11.1

  1. a
    1. No
    2. Yes
    3. No
    4. Yes
    5. Yes
    6. No
    7. Yes
    8. y2=1+x2
      y=±1+x2
      No
    9. y=2x
      y=(2x)2
      Yes
    10. y2=1x2
      y=±1x2
      No
  2. All real numbers ,
  3. a
    54x0554x454x54(,54]
  4. t20
    t0 or 0
  5. All real or (,)
  6. a
    t2+1011t21tit=R
  7. a
    x160+16+16x16
    [16,)
  8. x23x40
    (x4)(x+1)0
    x4,1
  9. a
    3x120+12+123x3123x4x2250(x5)(x+5)0x5,5x4,±5
  10. g(0)=4(0)4
    g(0)=4
  11. g(2)=352
    g(2)=325
  12. f(9)=(9)2+4
    f(9)=81+4
    f(9)=85
  13. f(10)=103
    f(10)=7
  14. f(2)=322
    f(2)=192
    f(2)=19189
    f(2)=179
  15. f(2)=3213
    f(2)=313
    f(2)=6
  16. k(2)=242(2)2
    k(2)=2442
    k(2)=242
    k(2)=32
  17. p(2)=242(2)+1+1
    p(2)=244+1+1
    p(2)=243+1
    p(2)=264+1
    p(2)=132+13132
  18. h(4x)=(4x)3+2
    h(4x)=64x3+2
  19. h(n+2)=4(n+2)+2
    h(n+2)=4n+8+2
    h(n+2)=4n+10
  20. h(1+x)=3(1+x)+2
    h(1+x)=3+3x+2
    h(1+x)=3x1
  21. h(13)=3213+3
    h(13)=23323
    h(13)=8323
    h(13)=2423
  22. h(x4)=(x4)2+1
    h(x4)=x8+1
  23. h(t2)=(t2)2+t
    h(t2)=t4+t
  24. f(0)=|3(0)+1|+1
    f(0)=1+1 or 2
  25. f(6)=2|(6)2|+1
    f(6)=2|62|+1
    f(6)=2(4)+1
    f(6)=8+1 or 7
  26. f(10)=|10+3|
    f(10)=13
  27. p(5)=|5|+1
    p(5)=5+1
    p(5)=4

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