Why DFT is needed?

Related questions

1. What is difference between DFT and FFT?
2. What is FFT in Python?
3. Is failure to thrive a medical diagnosis?
4. What is a FFT analyzer?
5. What is twiddle factor in FFT?
6. How does a FFT work?
7. Is failure to thrive a disability?
8. What does failure to thrive mean in medical terms?
9. What is sampling frequency in FFT?
10. What are FFT coefficients?

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5. #process
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9. #logic
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11. #which
12. #become
13. #production
14. #normal
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17. #design