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11 November, 23:31

Which of the following is an odd function?

a) f (x) = 3x2+x

b) f (x) = 4x3+7

c) f (x) 5x2+9

d) f (x) = 6x3+2x

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Answers (1)
  1. 11 November, 23:55
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    Hello:

    odd function is : d) f (x) = 6x3+2x

    because for all x in R : f (-x) = 6 (-x) 3 + 2 (-x)

    = - 6x3-2x ... (-x) 3 = - x3

    = - (6x3+2x)

    f (-x) = - f (x)
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