### Questions (9)

 2 Determining the parity (even or odd) of pi notation 2 Equation relationship between the arithmetic mean, the geometric mean, and the harmonic mean of more than two numbers 2 Knowing the arithmetic, geometric, and harmonic mean of a set, can I find the number of terms in the set? If not, what more information do I need? 1 Can I solve for $\sum_{i=1}^{n}{a_i}$ knowing $\sum_{i=1}^{n}{\ln(a_i)}$? 0 Simplifying $\exp(a)\ln(b)$

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### Answers (5)

 3 Is there any closed-form formula for $\prod_{k=2}^n \ln(k)$ 2 Does this operation have a name? 1 What does it mean when there is a number to the left of a summation sigma? 1 Formula For A Recursive Arithmetic Sequence 0 System of equations for operations

### Tags (21)

 3 arithmetic × 2 1 sequences-and-series × 2 3 elementary-number-theory × 2 1 induction 2 binary-operations 0 means × 3 2 terminology 0 logarithms × 2 1 recursion × 2 0 exponential-function × 2

### Bookmarks (4)

 2 Knowing the arithmetic, geometric, and harmonic mean of a set, can I find the number of terms in the set? If not, what more information do I need? 1 Can I solve for $\sum_{i=1}^{n}{a_i}$ knowing $\sum_{i=1}^{n}{\ln(a_i)}$? 1 $\sqrt {144} = 12$ How can I find it without calculator? 0 Formula for the sum of distinct prime factors of $n$

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