$\"\"$

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The integral function is $\"\"$ .

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Re-write the integral as $\"\"$ .

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Apply sum formula of integration: $\"\"$ . $\"\"$

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$\"\"$ .

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$\"\"$

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Graph of the function $\"\"$ :

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$\"\"$

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Observe the graph:

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The value of integral is $\"\"$ .

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$\"\"$

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$\"\"$ .