Question: I don't understand this. Write the following expressions using summation notation. (For example, consider X1 + 3x2. The goal is to write x1 + 3x2

I don't understand this.

Write the following expressions using summation notation. (For example, consider X1 + 3x2. The goal is to write x1 + 3x2 = Et_1 cixi. That is, determine the vector c and integer n; here, c = [1 3] and n = 2.) a. X1 + X2 +X3 + X4+X5 b. X1 + 2x2 + 3x3 + 4x4 +5x5 C. X1 + X2 + X3 + X4+...+ X100 d. X1 + 2x2 + 3X3 + 4X4 + ... + nxn e. X1 - X2 + X3 - X4 + ... + X2n-1 - Xzn

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