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comment Confusing algebra rule: why $\frac{7^{n+1}-1}{6} + 7^{n+1} = \frac{7^{n+2}-1}{6}$?
Unnecessarily complex, not sure why this is the selected answer
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21
awarded  Popular Question
Oct
21
awarded  Popular Question
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29
awarded  Popular Question
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25
awarded  Notable Question
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24
comment $|x| - |y| \leq |x-y|?$
that is pretty clever. thanks!
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24
accepted $|x| - |y| \leq |x-y|?$
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24
asked $|x| - |y| \leq |x-y|?$
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20
accepted Spivak Absolute Value Problem (Prologue 9-v)
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asked Spivak Absolute Value Problem (Prologue 9-v)
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2
awarded  Curious
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29
asked Surface Area of Solid of Revolution Derivation
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25
accepted Understanding Related Rates Ladder Problem
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asked Understanding Related Rates Ladder Problem
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20
awarded  Notable Question
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22
awarded  Popular Question
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22
awarded  Popular Question
Apr
19
accepted Infinite number of solutions to the Diophantine equation $x^2 + y^2 = z^3$.
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19
accepted Proof of Compactness Theorem
Apr
19
comment Understanding Diophantine Equation Proof /w link
Alright thanks a lot!