The distance covered by a bike is given by the expression 2x² +6x -20. The time taken by the bike to covered this distance is given by the expression x - 2. Find the speed of the bike.
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The distance covered by a bike is given by the expression 2x² +6x -20. The time taken by the bike to covered this distance is given by the expression x - 2. Find the speed of the bike.
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Answer:
distance ,s=2x² +6x -20
time taken,t=x - 2
speed=ds/dt
so,ds/dx= 4x+6....eq(1)
and dt/dx =1.....eq(2)
by dividing eq(1) by (2)
we get,
ds/dt=4x+6
so, the speed of bike is 4x+6