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In this equation '' f (x) = x^4 + 3x -9'', why are 3, 9 constants and x variable if I do the differentiation and the integration?

Indranil  Oct 27, 2017
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f (x) = x^4 + 3x -9

 

f ' (x)  = 4x^3  +  3

 

∫  x^4 + 3x - 9  dx   =    x^5 / 5   +  3x^2 / 2  -   9x

 

 

 

cool cool cool

CPhill  Oct 27, 2017

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