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Amplitude modulated wave is represented by V AM = 10[1 + 0.4 cos(2 π × 10 4 t] cos(2 π × 10 7 t). The total bandwidth of the amplitude modulated wave is:

1. 10 kHz
2. 20 MHz
3. 20 kHz
4. 10 MHz

Correct answer: 20 kHz

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