JAMB - Mathematics (1983 - No. 20)
Find the missing value in the following table \(\begin{array}{c|c} x & -2 & -1 & 0 & 1 & 2 & 3 \\ \hline Y = x^3 - x + 3 & & 3 & 3 & 3 & 9 & 27\end{array}\)
-3
3
-9
13
9
Magyarázat
When x = -2, y = x3 - x + 3
= -23 - (-2) + 3
= -8 + 2 + 3
= -3
= -23 - (-2) + 3
= -8 + 2 + 3
= -3