यदि $\int {x{e^{2x}}\,dx} = {e^{2x}}f(x) + C$ है,जहाँ $C$ समाकलन का स्थिरांक है,तो $f(x)$ क्या है?

  • A
    $(3x - 1)/4$
  • B
    $(2x + 1)/2$
  • C
    $(2x - 1)/4$
  • D
    $(x - 4)/6$

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