The velocity-time graph of a car moving along a straight road is shown in figure. The average velocity of the car in first 25 seconds is
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(i) `(dy)/(dx)=2x^(2-1)-6(1)=2x-6` (ii) `(dy)/(dx)=5x^(5-1)+2e^(x)=5x^(4)+2e^(x)` (iii) `(dy)/(dx)=4(1/x)+(-sin x)=4/x-sin x`
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