# René G

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# 8 Questions

 39 There exists a power of 2 such that the last five digits are all 3's or 6's. Find the last 5 digits of this number 1 Denominators of partial sums of the harmonic series 1 Prove the ring $a+b\sqrt[3]{2}+c\sqrt[3]{4}$ has inverse and is a field 0 Cross sections of a cone 0 Proving $\lim_{x \to 1}x^2-4x= -3$

# 317 Reputation

 +5 Prove the ring $a+b\sqrt[3]{2}+c\sqrt[3]{4}$ has inverse and is a field +5 Denominators of partial sums of the harmonic series +110 There exists a power of 2 such that the last five digits are all 3's or 6's. Find the last 5 digits of this number

 2 How would you explain to a 9th grader the negative exponent rule? 0 An infinite union of closed sets is a closed set?

# 17 Tags

 0 number-theory × 2 0 field-theory 0 elementary-number-theory 0 volume 0 geometric-construction 0 general-topology 0 limits 0 homework 0 real-analysis 0 contest-math

# 4 Accounts

 Mathematics 317 rep 211 Stack Overflow 202 rep 5 Programming Puzzles & Code Golf 111 rep 1 Computer Science 101 rep