Q. The differentiable functions x and y are related by the following equation:y1=8−xAlso, dtdy=−0.5.Find dtdx when y=0.2.
Differentiate with respect to t: First, we need to differentiate the given equation with respect to t. The equation is y1=8−x. We will use implicit differentiation.
Apply chain rule: Differentiating both sides of the equation with respect to t, we get:(dtd)(y1)=(dtd)(8−x)Since 8 is a constant, its derivative is 0, and the derivative of −x with respect to t is −(dtdx).
Substitute derivatives: The left side of the equation involves the derivative of a reciprocal function. Using the chain rule, the derivative of y1 with respect to t is: dtd(y1)=−dtdy/y2
Given values substitution: Substituting the derivatives into the differentiated equation, we get:−dtdy/y2=−dtdx
Simplify to solve: We are given that dtdy=−0.5 and we need to find dtdx when y=0.2. Let's substitute these values into the equation:−(−0.5)/(0.22)=−(dtdx)
Calculate final value: Simplify the equation to solve for (dtdx):(dtdx)=−(−0.220.5)(dtdx)=0.040.5
Calculate final value: Simplify the equation to solve for (dtdx):(dtdx)=−(−0.5)/(0.22)(dtdx)=0.040.5Calculate the value of (dtdx):(dtdx)=0.040.5(dtdx)=12.5
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