Use the Appropriate Formula to Find the Indicated Figurate Number $\mathrm { P } _ { 6 } = 21$

question 128

Multiple Choice

Use the appropriate formula to find the indicated figurate number.
-the 6th pentagonal number

• A) \(\mathrm { P } _ { 6 } = 21\)
• B) \(\mathrm { P } _ { 6 } = 36\)
• C) \(\mathrm { P } _ { 6 } = 57\)
• D) \(\mathrm { P } _ { 6 } = 51\)

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