$\"\"$

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(a).

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Find the solution set for the inequality $\"\"$ .

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Observe the graph :

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The solution set is $\"\"$ for $\"\"$ .

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(b).

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Find the solution set for the inequality $\"\"$ .

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Observe the graph :

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The solution set is $\"\"$ for $\"\"$ .

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$\"\"$

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(a).The solution set is $\"\"$ .

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(b).The solution set is $\"\"$ .