If f :R-R, where f(x) = ax + cosx and f(x) is bijective, then

  1. a belongs to R
  2. a belongs to R+
  3. a belongs to R-
  4. a belongs to R - (-1,1)

F(X)=ax+bsinx For strictly increasing in its domain R-R F`(X)>0 a>sinx a>1 For strictly decreasing in its domain F`(X)
  • -15
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