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11th

grade

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Derivate, ecuatia tangentei

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10 questions

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  • 1. Multiple Choice
    3 minutes
    1 pt

    Fie  f:(0,)R, f(x)=3x2xlnx.f:\left(0,\infty\right)\rightarrow R,\ f\left(x\right)=3x^2-x\ln x.  Calculați  f(e)f'\left(e\right)  

     00  

     6e26e-2  

     6e6e  

     6e16e-1  

  • 2. Multiple Choice
    3 minutes
    1 pt

    Să se afle panta tangentei la graficul funcției  f:(0,)R, f(x)=ln2x+2x2xf:\left(0,\infty\right)\rightarrow R,\ f\left(x\right)=\ln^2x+2x^2-x  în punctul de abscisă  x=ex=e  

     4e1+2e4e-1+\frac{2}{e}  

     4e2e+24e^2-e+2  

     4e+12e4e+1-2e  

     1+4e1+4e  

  • 3. Multiple Choice
    3 minutes
    1 pt

    Să se afle derivata funcției   f(x)=ln(x+x25), x>5\ f\left(x\right)=\ln\left(x+\sqrt{x^2-5}\right),\ x>\sqrt{5}  

     xx25\frac{x}{\sqrt{x^2-5}}  

     1x25\frac{1}{\sqrt{x^2-5}}  

     1x+x25\frac{1}{x+\sqrt{x^2-5}}  

     xx+x25\frac{x}{x+\sqrt{x^2-5}}  

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