4
1
-1
-4
Correct answer is D
y = x2 - 2x - 3,
Then δyδx=2x−2
But at minimum point,δyδx=0,
Which means 2x - 2 = 0
2x = 2
x = 1.
Hence the minimum value of y = x2 - 2x - 3 is;
ymin = (1)2 - 2(1) - 3
ymin = 1 - 2 - 3
ymin = -4
In the diagram, PX is a tangent to the circle and RST is an equilateral triangle. Calculate < PTS...
From the diagram above, find the required roots/region of x. ...
Factorize r2 - r(2p + q) + 2pq ...
If p=√rs3t, express r in terms of p, s and t? ...
Simplify (0.09)2 and give your answer correct to 4 significant figures...
In the diagram, O is the centre of the circle ∠PQR = 75o, ∠OPS = yo and ¯OR is parallel...
An arc subtends an angle of 30<sup>o</sup> at the centre of a circle radius 12cm. Calcul...