### Questions (10)

 2 How to calculate this limit without L'Hopital's rule 2 Why $r$ should be $\in\Bbb Q$ why not $r\in\Bbb R$ 1 Prove : product of two ideals is also an ideal 1 Prove that a group with $3$ elements is cyclic? 1 How to prove that $\lim_{h\to 0} \, \frac{e^h-1}{h}$

### Reputation (134)

 +3 Proving an identity of Riemannian tensor +11 Prove : product of two ideals is also an ideal +13 How to calculate this limit without L'Hopital's rule +5 Prove that a group with $3$ elements is cyclic?

 2 solution to equations having 4 variables 1 Using differentials in integration by substitution 0 How to prove that $\lim_{h\to 0} \, \frac{e^h-1}{h}$

### Tags (32)

 2 systems-of-equations 1 substitution 2 symmetric-polynomials 0 limits × 3 2 quadratics 0 exponential-function × 2 1 calculus × 4 0 derivatives × 2 1 integration 0 proof-verification × 2

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