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Let a curve y = f(x) pass through the points (0, 5) and (log e 2, k). If the curve satisfies the differential equation 2(3 + y)e 2x dx – (7 + e 2x )dy = 0, then k is equal to

1. 16
2. 8
3. 32
4. 4

Correct answer: 8

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