Linear Inequations — MATHS STD 11 Science — Question
Gujarat BoardEnglish MediumSTD 11 ScienceMATHSLinear Inequations3 Marks
Question
Solve the following linear inequations in R: $\frac{4\text{x}+3}{2\text{x}-5}<6$
✓
Answer
$\frac{4\text{x}+3}{2\text{x}-5}<6$ $\frac{4\text{x}+3}{2\text{x}-5}-6<0$ $\frac{4\text{x}+3-12\text{x}+30}{2\text{x}-5}<0$ $\frac{-8\text{x}+33}{2\text{x}-5}<0$ $\frac{8\text{x}-33}{2\text{x}-5}>0$ Case: 1 $8\text{x}-33>0$ and $2\text{x}-5>0$ $\Rightarrow\text{x}>\frac{33}{8}$ and $\text{x}>\frac{5}{2}$ $\Rightarrow\text{x}>\frac{33}{8}$ Case 2: $8\text{x}-33<0$ and $2\text{x}-5<0$ $\Rightarrow\text{x}>\frac{33}{8}$ and $\text{x}<\frac{5}{2}$ $\Rightarrow\text{x}<\frac{5}{2}$ Hence the solution set is $\Big(-\infty,\frac{5}{2}\Big)\cup\Big(\frac{33}{8},\infty\Big)$
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