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The power delivered by a battery to an apparatus of resistance R (in ohms) is P = 2.35R /(R + 0.5)^2

watts.Find the rate of change of power with respect to resistance for R = 9.(Round your answer to four decimal places

**2. quotient rule**

**3. 2.35(9+.05)^2-2(r+.5)/(r+0.5)^4**