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we are the asked to solve these questions via MATLAB 1. x(t)=1+cos(210000t)+cos(215000t)+cos(225000t) Plot x(t). Find fundamental period and frequency of the signal. Plot x(t) signal

we are the asked to solve these questions via MATLAB
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1. x(t)=1+cos(210000t)+cos(215000t)+cos(225000t) Plot x(t). Find fundamental period and frequency of the signal. Plot x(t) signal with samples. 2. Write a function to calculate a standard deviation of an array consist of 10 numbers generated randomly between 0 and 4

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