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Evaluate the series, if it converges.
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Contrast
The difference in visual properties that makes an object or its representation in an image distinguishable from other objects and the background.
Darkest
The most intense or deepest part or version of a color, or the condition of very low light levels where objects are barely visible or obscured.
Typewriters Produced
Refers to the quantity or models of typewriters manufactured, offering insight into the history or output of typewriting machines.
Courier New
A monospaced font commonly used in typing and programming, known for its clear, typewriter-style appearance.
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