1.

For which of the values of x, the rate of increase of the function y=3x^2-2x+7 is 4 times the rate of increase of x?(a) -1(b) \(\frac{1}{3}\)(c) 1(d) 0The question was posed to me by my college director while I was bunking the class.The origin of the question is Derivatives Application in portion Application of Derivatives of Mathematics – Class 12

Answer»

Correct OPTION is (c) 1

The best I can EXPLAIN: Given that, \(\FRAC{dy}{DT}=4.\frac{dx}{dt}\)

y=3x^2-2x+7

\(\frac{dy}{dt}\)=(6x-2) \(\frac{dx}{dt}\)

4.\(\frac{dx}{dt}\)=(6x-2) \(\frac{dx}{dt}\)

4=6x-2

6x=6

⇒x=1



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