Given Equation Differentiation: We are given the equation (xy)+xy=−2 and we need to find its derivative with respect to x. We will use the rules of differentiation to differentiate each term separately.
Quotient Rule Application: Differentiate the first term xy with respect to x. Since y is a function of x, we will use the quotient rule which is dxd(vu)=v2v(dxdu)−u(dxdv). Here, u=y and v=x, so dxdu=dxdy and dxdv=1.
Product Rule Application: Applying the quotient rule to xy, we get:dxd(xy)=x2x(dxdy)−y(1)=x2x(dxdy)−y
Combining Derivatives: Differentiate the second term xy with respect to x. Since this is a product of two functions, we will use the product rule which is dxd(uv)=udxdv+vdxdu. Here, u=x and v=y, so dxdu=1 and dxdv=dxdy.
Simplifying Equation: Applying the product rule to xy, we get: dxd(xy)=x(dxdy)+y(1)=x(dxdy)+y
Correction of Mistake: Now, we combine the derivatives of both terms and set the derivative of the entire equation equal to the derivative of −2, which is 0 since −2 is a constant.dxd(xy)+dxd(xy)=dxd(−2)(x2x(dxdy)−y)+(x(dxdy)+y)=0
Correction of Mistake: Now, we combine the derivatives of both terms and set the derivative of the entire equation equal to the derivative of −2, which is 0 since −2 is a constant.dxd(xy)+dxd(xy)=dxd(−2)x2(xdxdy−y)+(xdxdy+y)=0We simplify the equation by combining like terms. However, we need to be careful with the terms involving dxdy, as they cannot be simply added or subtracted without considering their coefficients.x2(xdxdy−y)+(xdxdy+y)=0x2(xdxdy−y+x2dxdy+x2∗y)=0
Correction of Mistake: Now, we combine the derivatives of both terms and set the derivative of the entire equation equal to the derivative of −2, which is 0 since −2 is a constant.dxd(xy)+dxd(xy)=dxd(−2)(x2x(dxdy)−y)+(x(dxdy)+y)=0We simplify the equation by combining like terms. However, we need to be careful with the terms involving dxdy, as they cannot be simply added or subtracted without considering their coefficients.(x2x(dxdy)−y)+(x(dxdy)+y)=0x2x(dxdy)−y+x2(dxdy)+x2⋅y=0We made a mistake in the previous step by incorrectly combining the terms. We should have found a common denominator before combining them. Let's correct this.x2x(dxdy)−y+x(dxdy)+y=0x2x(dxdy)−y+x3(dxdy)+x2⋅y=0
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