My Math Forum Induction 2

 Calculus Calculus Math Forum

September 3rd, 2015, 08:36 AM   #1
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Joined: Aug 2015
From: Podgorica

Posts: 61
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Induction 2

Result:420
I keep getting 465.
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 September 3rd, 2015, 09:08 AM #2 Math Team     Joined: May 2013 From: The Astral plane Posts: 2,257 Thanks: 928 Math Focus: Wibbly wobbly timey-wimey stuff. Next time please show us what work you've done. That will make it easier for us to help you. Try this: $\displaystyle ln \left ( \prod_{k=10}^{30} e^k \right )$ $\displaystyle = \sum_{k=10}^{30} k = \sum_{k=1}^{30} k - \sum_{k = 1}^9 k$ $\displaystyle = \frac{30 \cdot 31}{2} - \frac{9 \cdot 10}{2} = 420$ -Dan Thanks from med1student

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