Para las siguientes funciones, calcule las derivadas parciales que se indican a continuación: f(x, y)=e^x+e^y+〖2x〗^2+4y+3, calcule ( ∂^2 f)/〖∂x〗^2

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual 

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.