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y^(''')+6y^('')+11y^(')+6y=0

y+6y+11y+6y=0 y^{\prime \prime \prime}+6 y^{\prime \prime}+11 y^{\prime}+6 y=0

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Q. y+6y+11y+6y=0 y^{\prime \prime \prime}+6 y^{\prime \prime}+11 y^{\prime}+6 y=0
  1. Characteristic Equation: The given differential equation is a linear homogeneous ordinary differential equation with constant coefficients. The characteristic equation is found by replacing yy with r3r^3, yy'' with r2r^2, yy' with rr, and yy with 11.\newlineCharacteristic equation: r3+6r2+11r+6=0r^3 + 6r^2 + 11r + 6 = 0
  2. Find Roots: We need to find the roots of the characteristic equation. We can try to factor it, looking for integer roots among the factors of 66 (the constant term).\newlineBy trying possible roots, we find that r=1r = -1 is a root because (1)3+6(1)2+11(1)+6=1+611+6=0(-1)^3 + 6(-1)^2 + 11(-1) + 6 = -1 + 6 - 11 + 6 = 0.
  3. Factorization: Now we can factor out (r+1)(r + 1) from the characteristic equation using polynomial division or synthetic division.(r+1)(r2+5r+6)=0(r + 1)(r^2 + 5r + 6) = 0
  4. Further Factorization: The quadratic factor can be factored further: r + \(1)(r + 22)(r + 33) = 00\
  5. General Solution: The roots of the characteristic equation are r=1r = -1, r=2r = -2, and r=3r = -3.
  6. General Solution: The roots of the characteristic equation are r=1r = -1, r=2r = -2, and r=3r = -3.The general solution to the differential equation is a linear combination of exponential functions based on the roots of the characteristic equation:\newliney(t)=C1e(t)+C2e(2t)+C3e(3t)y(t) = C_1e^{(-t)} + C_2e^{(-2t)} + C_3e^{(-3t)}\newlinewhere C1C_1, C2C_2, and C3C_3 are constants determined by initial conditions.

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