Write Out the First Three Terms and the Last Term $$\sum _ { i = 1 } ^ { 70 } - 2 i$$

question 31

Multiple Choice

Write out the first three terms and the last term of the arithmetic sequence.
- $$\sum _ { i = 1 } ^ { 70 } - 2 i$$

• A) \(- 2 + 4 - 12 + \ldots - 280\)
• B) \(- 1 - 2 - 4 - \ldots - 140\)
• C) \(- 2 - 4 - 8 - \ldots - 280\)
• D) \(- 2 - 4 - 6 - \ldots - 140\)

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Definitions:

Microinch

A unit of length equal to one millionth of an inch, often used in the precision measurement of surface roughness in engineering.

Texture

The feel, appearance, or consistency of a surface, material, or fabric, arising from its structure and composition.

Plus or Minus

Symbolized as ±, a notation used in measurements to indicate the tolerance range or allowable variation from a specified dimension.

Surface Irregularities

Variations or deviations from the normal flatness or smoothness of a surface, which can affect the functionality or appearance.