Recent content by oswald

  1. O

    Implicit Differentiation: Find Y

    Homework Statement Find y' Homework Equations The Attempt at a Solution My solution: it's correct?
  2. O

    Understanding the Chain Rule for Derivatives

    Homework Statement Homework Equations The Attempt at a Solution My dought is about if ,dw/dy*dy/dt = (-2)t^(-3)*dy/dt
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    Calculating the Derivative of w with Respect to t

    f(x) = ln { e^[ln(x+1)] } well, i have this answer, but i don't understand ln [ e^ln(x+1) ] = ln(x+1) f'(x) = 1/(e^ln(x+1)) * e^ln(x+1) * 1/(x+1) = 1/(x+1)
  4. O

    Calculating the Derivative of w with Respect to t

    Chain Rule Exponential and logarithmic f(x) = ln [ e^ln(x+1) ] f' = ?
  5. O

    Calculating the Derivative of w with Respect to t

    Homework Statement Finda dw/dt w=3xy/x²-y² x=t3 y=e2t Homework Equations w=(3t3e2t)/(t6-e4t) The Attempt at a Solution Well,is there anothe way to solve this, instead of dw/dt; like dw/dx * dw/dt + dw/dy * dy/dt ?
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    Input-output model [easay but borring ]

    i understand, i remembered the mean i x j [ n,m i x j ] x w c g w c g
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    Input-output model [easay but borring ]

    1- Question and data Find the production cost for wine, cloth and gold. A 0,06 0,03 0,02 0,08 0,175 0,32 0,01 0,015 0,34 A0 0,006 0,005 0,01 K 2,2 0 0 1 0,5 0,26 0 0 0 De 0,2 0 0 0 0,1 0 0 0 0 D 10 10 0 d*a0 0,06 0,05 0,1 0,06 0,05 0,1 0 0 0 k*de 0,44 0 0 0,1 0,05 0,026 0 0 0 A+da0...
  8. O

    Maximization subject equality constraint

    2xyz³/50 =λ x²z³/10 =λ 3x²yz²/100= λ hence, 2xyz³/50 = x²z³/10 = 3x²yz²/100 substituting: 2xyz³/50 = x²z³/10 2y/50 = x /10 20 y = 50x x²z³/10 = 3x²yz²/100 z/10 = 3y/100 100 z = 30y 50x+10y+100z = 1000 20y + 10y + 30y = 1000 60y = 1000 y = 50/3 ah, i made a mistake in solving the four...
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    Maximization subject equality constraint

    Homework Statement Max f = x²yz³ sub. 50x+10y+100z = 1000 Homework Equations Using Lagrange: L = x²yz³ - λ ( 50x + 10 y + 100z - 1000 ) Lx = 2xyz³ - λ50 = 0 Ly = x²z³ - λ10 = 0 Lz = 3x²yz² - λ100 = 0 i found z = 2,5 x= 10 y=25, what's wrong? The Attempt at a...
  10. O

    PV of Income Path: Y1=100, Y2=125 & r=0.5

    i found the anser, it s the definition 1+r/2+r x y1 + y2/1+r ! its 109,8
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    PV of Income Path: Y1=100, Y2=125 & r=0.5

    Homework Statement What is the permanent income that corresponds to present value of the two period income path Y 1 =100, Y 2 =125 for the real interest rate r=.5? (Note: 50% not ½%!) Homework Equations PV = Y1 + Y2/(1+r)^t The Attempt at a Solution Correct Answer: a) 110...
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    Optimization inequality constraint

    why λ + 17 + 1/16 > 0?
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    Optimization inequality constraint

    complete the square on -16x² + 2x + 17 + h2 = 0 or -16x² + 2x + 17 = 0, because i found positive and negative root [ x=~+-1] on -16x² + 2x + 17=0 and i don't know how solve with λ2.
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    Optimization inequality constraint

    Homework Statement Minimize 2x²+2y²-2xy-9y subject 4x + 3y =,< 10 , y - 4x² =,< -2 x >,= 0 and y >,= 0. I don't undersant this: "This equation has no nonnegative root, which contradicts a nonnegativity constraint." and how we solve -16x² + 2x + 17 + h2 = 0
  15. O

    What Is the Long-Term Vector Response for Markov Transition Matrix?

    answer http://www.yaronet.com/posts.php?s=108496
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