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The Chain Rule is a formula for computing the derivative of the composition of two or more functions. For instance, if f and g are functions, then the chain rule expresses the derivative of their composition. The Chain Rule Formula is as follows – dy/dx = dy/du * du/dx ...

1. In water, the direction along the stream is called downstream. And the direction against the stream is called upstream. 2. Let the speed of a boat in still water be u km/hr and the speed of the stream be v km/hr, then Speed downstream = (u + v) km/hr ...

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