La temperatura a una distancia r del centro de una lámina está dada por t=40 (r2? 2r) . la variación instantánea de la temperatura respecto a r está dada por:

For this, the first thing to do is to assume that the function of temperature with respect to r is written in one of the following ways:

Way 1:

Way 2:

To find the instant variation we must find the derivative of the temperature with respect to the distance r.

We have then:

For function 1:

Rewriting

For function 2:

Rewriting

The instantaneous variation of the temperature with respect to r is given by:

Assuming function 1:

Assuming Function 2:

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step-by-step explanation:

true !

step-by-step explanation: