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May 19, 2020 6:44 pm 20 pts
Q.5 (MCQ) If r"y° is an integrating factor of the following differential equation u(1+ry)dr + z(l - ry)dy = 0 then the ordered pairs (h, k) is equal to 1. (-2,-2) 2. (-2,-1) 3. (-1,-2) 4. (-1-1) Q.6 (MCQ) Let zs =fy) be the solution of the following diferential equation 2re'dr + (r*e+cos y)dy = 0 which passes through the origin then the lim,- f(y) equals 1.0 2 .doesn't exist. Q.7 (MSQ) Consider the differential equation (3 +5x-y)dr + (3ry +2r")dy = 0 then which of the following is an integrating factor 1. 2. y 3. Q.8 (MCQ) The solution of the following differential equation (2-dr + rydy =0; v(1) =2 represent 1. circle, 2. ellipse. 3 hyperbola. 4.parabola.
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