# Matthew Fahrbach

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bio website location Lexington, KY age 21 member for 1 year, 6 months seen 1 hour ago profile views 64

# 49 Actions

 Nov8 awarded Critic Jun20 revised Maximum n so there exist two equal sum, 3-element subsets from a 9 element set of positive integers Added MathJaX Jun20 suggested suggested edit on Maximum n so there exist two equal sum, 3-element subsets from a 9 element set of positive integers Jun20 revised Show that $(1+x)(1+y)(1+z)\ge 8(1-x)(1-y)(1-z)$. Corrected mathematical error Jun20 suggested suggested edit on Show that $(1+x)(1+y)(1+z)\ge 8(1-x)(1-y)(1-z)$. Jun15 revised What is the complement of $A = \{1,3,5\}$ in $S = \{1,2,3,4,5,6\}$? edited body Jun15 revised What is the complement of $A = \{1,3,5\}$ in $S = \{1,2,3,4,5,6\}$? added 5 characters in body Jun15 answered What is the complement of $A = \{1,3,5\}$ in $S = \{1,2,3,4,5,6\}$? Jun15 awarded Fanatic Jun14 suggested suggested edit on The basis of a subgroup $H \subset \mathbb Z^4$ Jun14 suggested suggested edit on The basis of a subgroup $H \subset \mathbb Z^4$ Jun11 revised suppose $\gcd(a,b)= 1$ and $a$ divides $bc$. Show that $a$ must divide $c$. Formatted the variables in the title Jun11 suggested suggested edit on suppose $\gcd(a,b)= 1$ and $a$ divides $bc$. Show that $a$ must divide $c$. Jun9 revised How do I solve such logarithm Error in the second example Jun9 revised How do I solve such logarithm added 306 characters in body Jun9 revised How do I solve such logarithm added 254 characters in body Jun9 answered How do I solve such logarithm May25 answered What is $\;\int xe^{-x^2} \,dx\;?$ May23 revised Find the limit without use of L'Hôpital or Taylor series: $\lim \limits_{x\rightarrow 0} \left(\frac{1}{x^2}-\frac{1}{\sin^2 x}\right)$ Added the calculus tag May23 suggested suggested edit on Find the limit without use of L'Hôpital or Taylor series: $\lim \limits_{x\rightarrow 0} \left(\frac{1}{x^2}-\frac{1}{\sin^2 x}\right)$