Q. Solve the equation.dxdy=−10x4yChoose 1 answer:(A) y=−2(x+C)5(B) y=Ce−2x5(C) y=−2x5+C(D) y=e−2x5+C
Separate variables: We are given a first-order separable differential equation (dxdy)=−10x4y. To solve it, we need to separate the variables y and x on different sides of the equation.
Rewrite equation: Rewrite the equation to separate the variables: (y1)dy=−10x4dx.
Integrate both sides: Integrate both sides of the equation. The left side with respect to y and the right side with respect to x.∫(y1)dy=∫−10x4dx.
Exponentiate both sides: The integral of y1dy is ln∣y∣, and the integral of −10x4dx is −2x5. Don't forget to add the constant of integration C on one side.ln∣y∣=−2x5+C.
Solve for y: To solve for y, we exponentiate both sides of the equation to get rid of the natural logarithm.e(ln∣y∣)=e(−2x5+C).
Final solution: Since eln∣y∣ is just ∣y∣ and eC is a constant which we can call C′, we have:∣y∣=C′e−2x5.
Final solution: Since eln∣y∣ is just ∣y∣ and eC is a constant which we can call C′, we have:∣y∣=C′e−2x5.Since y can be positive or negative, we can drop the absolute value to get:y=±C′e−2x5.However, since the constant C′ can absorb the ± sign, we can write:y=Ce−2x5.
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