dashdart
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 28 How to solve $x^{1/2}-x^{1/3} = 0$ 7 Prove that if $n$ is a positive integer then $2^{3n}-1$ is divisible by $7$. 4 Normal Distribution and Conditional Probability 4 Which of the following expressions completes the identity 1 + sec^2 x? 4 Describing about the probability distribution of a scenario

### Reputation (1,459)

 +10 Why does the Dedekind Cut work well enough to define the Reals? +2 Assume that $1a_1+2a_2+\cdots+na_n=1$, where the $a_j$ are real numbers. +10 How to solve $x^{1/2}-x^{1/3} = 0$ +10 Normal Distribution and Conditional Probability

### Questions (17)

 36 A Young Math Enthusiast's Fear 29 Why does the Dedekind Cut work well enough to define the Reals? 19 Mathematical Career Advice to a young 16 year wannabe mathematician [closed] 7 Proving that these two fields $\mathbb Z_{11}[x]/〈 x^2+1〉$ and $\mathbb Z_{11}[x]/〈 x^2+x+4〉$ are isomorphic with $121$ elements each. 4 Basic Question on Gradients

### Tags (36)

 34 algebra-precalculus × 4 7 divisibility 28 exponentiation 5 geometry × 4 9 complex-numbers × 4 4 sequences-and-series × 4 9 elementary-number-theory × 3 4 roots 8 trigonometry × 3 4 statistics

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 Mathematics 1,459 rep 929 Area 51 151 rep 5 MathOverflow 136 rep 7 Ask Different 126 rep 4 English Language & Usage 108 rep 3

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