Select the Right Expression for the Following Sum and Prove $$P _ { \mathrm { n } } : 8 + 6 + 4 \ldots ( 10 - 2 n )$$

question 111

Multiple Choice

Select the right expression for the following sum and prove that your statement is true for all natural numbers n. $$P _ { \mathrm { n } } : 8 + 6 + 4 \ldots ( 10 - 2 n )$$

• A) \(\quad 9 n - n ^ { 2 }\)
• B) \(\quad 9 n - 2 n ^ { 2 }\)
• C) \(\quad 11 n - 2 n ^ { 2 }\)
• D) \(\quad 11 n - n ^ { 2 }\)
• E) none of the above

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