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प्रश्न
Choose the correct alternative:
The complementary function of (D2 + 4) y = e2x is
पर्याय
(Ax + B)e2x
(Ax + B)e-2x
A cos2x + B sin2x
Ae-2x + Be2x
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उत्तर
A cos2x + B sin2x
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