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### Questions (348)

 11 Geometric meaning of the determinant of a matrix 11 Physical meaning of linear ODE $xy''+2y' + \lambda^2 x y = 0$ 10 Sampling theorem. 9 Some method to solve $\int \frac{1}{\left(1+x^2\right)^{2}} dx$ and some doubts. 8 Solving the differential equation $x x''(t)=\frac{1}{t^3-t}$

### Reputation (3,163)

 +5 Calculate (or estimate) $S(t)=\sum_{j=0}^k \binom k j |t-j|^{k-1}$. +10 Riesz basis of Paley-Wiener space. +10 Simplify $\arccos\left(2\cos x\right)$. +5 Eventually periodic point and homeomorphism.

 8 How do I evaluate these undefined limits? 5 Find limit as x approaches infinity of exponential functions 5 Why are even/odd functions called even/odd? 4 Fidning multivariable limit 4 if $(a+\sqrt{a^2+1})$ and $(b+\sqrt{b^2+1})$ are converse then prove that a and b are opposites

### Tags (124)

 51 calculus × 89 11 sequences-and-series × 85 31 limits × 34 9 functions × 18 16 real-analysis × 16 7 trigonometry × 9 14 integration × 39 6 linear-algebra × 29 13 multivariable-calculus × 23 6 factorial × 2

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