meta user
network profile
| bio | website | |
|---|---|---|
| location | ||
| age | ||
| visits | member for | 10 months |
| seen | 1 hour ago | |
| stats | profile views | 30 |
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Sep 12 |
asked | Calculate $\cos(v+\frac{\pi}{6})$ when $\cos v = -\frac{2}{3}$ |
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Sep 10 |
accepted | Finding highest possible value of function |
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Sep 10 |
revised |
Finding highest possible value of function p(t), not t |
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Sep 10 |
asked | Finding highest possible value of function |
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Sep 4 |
accepted | Calculating the chess problem, sum $\sum_{k=0}^{63}2^{k}$ |
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Aug 30 |
comment |
Calculating the chess problem, sum $\sum_{k=0}^{63}2^{k}$ Discovered my mistake - it was supposed to be $2^{64} - 1$, not $2^{64} + 1$. |
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Aug 30 |
asked | Calculating the chess problem, sum $\sum_{k=0}^{63}2^{k}$ |
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Aug 29 |
accepted | Calculate absolute values with unknown constant |
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Aug 26 |
asked | Calculate absolute values with unknown constant |
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Aug 25 |
comment |
Finding all $x$ for $\frac{2x - 13}{2x + 3} \lt \frac{15}{x}$ It seems I figured everything out now. It was part of a bigger problem (uniting it with another inequality) and it seems like everything goes together perfectly now. Thanks a lot for the help. |
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Aug 25 |
comment |
Finding all $x$ for $\frac{2x - 13}{2x + 3} \lt \frac{15}{x}$ Sorry, that was me being too excited after suddenly getting things right for once. Should have kept checking for roots after finding the obvious one. Thank you. |
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Aug 25 |
comment |
Finding all $x$ for $\frac{2x - 13}{2x + 3} \lt \frac{15}{x}$ Thank you! Calculating for case (2) I find the root $-1$ for $2x^2 - 43x - 45$. Adding this to the roots of $2x(x+\frac{3}{2})$, this should mean that the entire expression is negative when $\frac{-3}{2} \lt x \lt -1$ or $0 \lt x$. However, when testing higher numbers (approximately where $x \gt 22$), $2x^2 - 43x - 45$ becomes positive and so the entire expression becomes positive. Why is this? |
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Aug 25 |
awarded | Commentator |
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Aug 25 |
comment |
Finding all $x$ for $\frac{2x - 13}{2x + 3} \lt \frac{15}{x}$ Thank you. Correction, though - the $45$ should be negative. |
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Aug 25 |
accepted | Finding all $x$ for $\frac{2x - 13}{2x + 3} \lt \frac{15}{x}$ |
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Aug 25 |
asked | Finding all $x$ for $\frac{2x - 13}{2x + 3} \lt \frac{15}{x}$ |
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Aug 24 |
accepted | How to find $k$'s quotient of $\frac{-18}{(-2)^k}$ |
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Aug 24 |
comment |
How to find $k$'s quotient of $\frac{-18}{(-2)^k}$ Thank you, I see now. But don't you mean $\frac{a(r^{n+1}-1)}{r-1}$? Or am I mistaken? |
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Aug 24 |
asked | How to find $k$'s quotient of $\frac{-18}{(-2)^k}$ |
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Aug 24 |
accepted | Getting wrong result calculating sums |
