8
3
7
-1
Correct answer is D
y = x2 - 6x + 8
dydx = 2x - 6
dydx = 0
2x - 6 = 0
x = 3
∴ y = 3^2 - 6(3) + 8
= 9 - 18 + 8
= -1
If y = 2x - sin2x, find dy/dx when x = π/4 ...
If y = x^2 - x - 12, find the range of values of x for which y \geq 0 ...
An arc of a circle of radius 14cm subtends angle 300° at the centre. Find the perimeter of the s...
If log_{10} x = \bar{2}.3675 and log_{10} y = \bar{2}.9738, what is the value of x +...
Find the value of (4^{\frac{1}{2}})^6...
A box contains 12 identical balls of which 5 are red, 4 blue, and the rest are green. If ...
The interior angles of a pentagon are 126o, 114o, y, 92o and 83o. Find the value of y....
(\sqrt[4]{3} + \sqrt[4]{2})(\sqrt[4]{3} - \sqrt[4]{2})(\sqrt{3} + \sqrt{2}) is equal to...