Q. If y3−x2=−1 then find dxdy at the point (3,2).Answer: dxdy∣∣(3,2)=
Differentiate with respect to x: Differentiate both sides of the equation with respect to x. We have y3−x2=−1. To find dxdy, we need to differentiate both sides of the equation with respect to x, using the chain rule for the y3 term since y is a function of x. dxd(y3)−dxd(x2)=dxd(−1)3y2(dxdy)−2x=0
Solve for dxdy: Solve for dxdy. Now we isolate dxdy on one side of the equation. 3y2(dxdy)=2xdxdy=3y22x
Substitute point into derivative: Substitute the point (3,2) into the derivative to find the slope at that point.We substitute x=3 and y=2 into the equation from Step 2.(dxdy)∣(3,2)=(3(2)2)2(3)(dxdy)∣(3,2)=(3⋅4)6(dxdy)∣(3,2)=126(dxdy)∣(3,2)=21
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