arm-education / arm-education/Digital-Signal-Processing-using-Arm-Cortex-M-based-Microcontrollers

Figure 2.4 looks wrong

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Description

Figure 2.4, graphing the discrete-time exponential signal, shows values = 0 for negative n. Maybe I'm wrong about this, but I think values continue upwards towards infinity for negative n. For example, 0.8^-1 = 1.25.

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