{21, 91, 221}
{21, 91, 221, 381}
{1,21, 91, 221}
{1,21, 91, 221,381}
Correct answer is A
multiples of 5 less than 20 = 5, 10 and 15
= [ 5, 10 and 15 ]x\(^2\) - x + 1
x\(^2\) - x + 1
when x = 5
5\(^2\) - 5 + 1; 25 - 5 + 1 --> 21
when x = 10
10\(^2\) - 10 + 1
100 - 9 = 91
when x = 15
15\(^2\) - 15 + 1
225 - 15 + 1 = 211
If the sum of the roots of 2x\(^2\) + 5mx + n = 0 is 5, find the value of m...
Express cos150° in surd form. ...
Find the unit vector in the direction of \(-2i + 5j\)....
If \(x = i - 3j\) and \(y = 6i + j\), calculate the angle between x and y...
In the diagram, a ladder PS leaning against a vertical wall PR makes angle x° with the horizonta...
A stone is thrown vertically upward and distance, S metres after t seconds is given by S = 12t ...
Given that \(P = \begin{pmatrix} 4 & 9 \end{pmatrix}\) and \(Q = \begin{pmatrix} -1 & -2 \\ ...
Adu's scores in five subjects in an examination are 85, 84, 83, 86...