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TN XII Math
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Objective type Questions and Answers
The gradient of the curve $y=-2x^{3}+3x+5$ at $x=2$ is
\[\begin{array}{1 1}(1)-20&(2)27\\(3)-16&(4)-21\end{array}\]
tnstate
class12
bookproblem
p229
objective
q1
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asked
May 15, 2013
by
poojasapani_1
edited
May 17, 2013
by
poojasapani_1
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1 Answer
$y= -2x^3+3x+5$
$\large\frac{dy}{dx}$$=-6x^2+3$
$\large\frac{dy}{dx} $$x=2 => -6 \times 2^2 +3 =-24 +3 =-21$
Hence 4 is the correct answer.
answered
May 16, 2014
by
meena.p
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