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If f(x)=1-x-x^(3), ............. |
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Answer» `f(f(x))=1-f(x)-f^(3) (x)` `f'(x)=-1-3x^(2)` (decreasing FUNCTION) `:. f(x) lt 1-5X` `1-x-x^(3) lt 1 -5x` `x^(3)-4x gt 0` `x(x^(2)-4) gt 0` |
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