Jambmaths question:
What are the integral values of x which satisfy the inequality $-1<3-2x\le 5$
Option A:
–1, 0,1,2
Option B:
–2,1, 0, –1
Option C:
0,1, 2
Option D:
–1,0,1
Jamb Maths Solution:
$\begin{align} & -1<3-2x\le 5 \\ & \text{solving inequality separately} \\ & -1<3-2x \\ & 2x<3+1 \\ & 2x<4 \\ & x<2 \\ & \text{Also} \\ & 3-2x\le 5 \\ & -2x\le 5-3 \\ & -2x\le 2 \\ & x\ge -1 \\ & \text{The range of the inequality becomes} \\ & -1\le x<2 \\ & \text{The integral of }x\text{ include }-1,0,1 \\\end{align}$
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