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Mathematics

If x ∈ I, find the smallest value of x which satisfies the inequation

2x+52>5x3+22x +\dfrac{5}{2} \gt \dfrac{5x}{3} + 2

Linear Inequations

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Answer

Given,

2x+52>5x3+22x5x3>25212x10x>1215 (Multiplying both sides by 6)2x>3x>322x + \dfrac{5}{2} \gt \dfrac{5x}{3} + 2 \\[0.5em] \Rightarrow 2x - \dfrac{5x}{3} \gt 2 - \dfrac{5}{2} \\[0.5em] \Rightarrow 12x - 10x \gt 12 - 15 \text{ (Multiplying both sides by 6)} \\[0.5em] \Rightarrow 2x \gt - 3 \\[0.5em] \Rightarrow x \gt - \dfrac{3}{2}

∴ Smallest value of x which satisfies this inequation is -1

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