JAMB - Mathematics (1980 - No. 8)
List all integer values of x satisfying the inequality -1 < 2x - 5 \(\leq\) 5
<2, 3, 4, 5
3, 4, 5
2, 3, 4
3, 4
คำอธิบาย
\(-1 < 2x - 5 \leq 5\)
\(\implies -1 + 5 < 2x - 5 + 5 \leq 5 + 5\)
\(4 < 2x \leq 10\)
\(\implies 2 < x \leq 5 \)
= 3, 4, 5.