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Mathematics
David Krell's user avatar
David Krell's user avatar
David Krell's user avatar
David Krell
  • Member for 1 year, 7 months
  • Last seen this week
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11 Questions

Score Activity Newest Views
8 votes
2 answers
848 views

Does a recursive definition of a variable make sense at all?

5 votes
1 answer
165 views

How to calculate limits of functions?

3 votes
4 answers
84 views

Finding and proofing a closed formula for $\sum_{n=1}^k\sqrt{1+\frac{1}{n^2}+\frac{1}{(n+1)^2}}$

3 votes
1 answer
158 views

Proof of n-times matrix multiplication

2 votes
2 answers
89 views

How to solve inequality with absolute values?

2 votes
1 answer
48 views

Deducing sequence convergence from inequalities involving sequence terms and a constant

2 votes
1 answer
59 views

How to deduce the monotonicity of a function from another function?

1 vote
1 answer
72 views

How to calculate the solution set for an equation with vectors?

1 vote
1 answer
62 views

How to proof that the perpendicular vector is perpendicular to all the vectors in the span and is not zero?

0 votes
2 answers
93 views

Proving that $0=3\cdot x-4\cdot x^3$ holds for $x=\sin(\frac{\pi}{3})$?

0 votes
1 answer
669 views

Subsumption of clauses, logic