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Finite and Infinite Set

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Question

Find out the truth sets of the following open sentences replacement sets are given against them.
$frac 5x>7;{1,2}$

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Solution

$5 x > 7$
$⟹ x > \frac{7}{5}$
$⟹ x > 1.4$
$∴$ $x \in 2 .$

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