Q.
If the rate of change in y=x33−2x2+7x−6 is three times the rate of change in x, then x =
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a
3
b
2
c
4
d
1
answer is B.
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Detailed Solution
dydt=3.dxdt dydt=(x2−4x+7)dxdt x2−4x+7=3 x2−4x+4=0 (x−2)2=0 ⇒ x=2
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