Question

Which expression is the expanded form of \[ \sum\limits_{i=1}^{N} x_i \]?

Options

• \[ x_1 + x_2 + x_3 + \ldots + x_N \]

• \[ x_0 + x_1 + x_2 + \ldots + x_N \]

• \[ x_1 \times x_2 \times x_3 \times \ldots \times x_N \]

• \[ x_1 + x_2 + x_3 + \ldots + x_{N-1} \]

Answer 1

Expanding \[ \sum\limits_{i=1}^{N} x_i \] gives \[ x_1 + x_2 + x_3 + \ldots + x_N \].