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permutation and the combination in the manusctip

1

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$begingroup$

I am quite wondered how someone writes the permutation/combination as the part of a formula in the manuscript?

For example, let $x$ be a set of values, $x=x_1,x_2,...,x_n$. Then if someone want to write the $sum (textcombination of two) +sum(textcombination of three)+...$. How can they do it? Just to add than I can use $sum_i=1^n-1sum_j>i^n x_i+x_j$ but imagine that you want to write $sumtext(combination of 10 out of n)$!

self-learning

share|cite|improve this question

asked Apr 1 at 13:21

RoseRose

205

$endgroup$

add a comment | 

1

1

$begingroup$

I am quite wondered how someone writes the permutation/combination as the part of a formula in the manuscript?

For example, let $x$ be a set of values, $x=x_1,x_2,...,x_n$. Then if someone want to write the $sum (textcombination of two) +sum(textcombination of three)+...$. How can they do it? Just to add than I can use $sum_i=1^n-1sum_j>i^n x_i+x_j$ but imagine that you want to write $sumtext(combination of 10 out of n)$!

self-learning

share|cite|improve this question

asked Apr 1 at 13:21

RoseRose

205

$endgroup$

add a comment | 

$begingroup$

I am quite wondered how someone writes the permutation/combination as the part of a formula in the manuscript?

For example, let $x$ be a set of values, $x=x_1,x_2,...,x_n$. Then if someone want to write the $sum (textcombination of two) +sum(textcombination of three)+...$. How can they do it? Just to add than I can use $sum_i=1^n-1sum_j>i^n x_i+x_j$ but imagine that you want to write $sumtext(combination of 10 out of n)$!

self-learning

share|cite|improve this question

asked Apr 1 at 13:21

RoseRose

205

$endgroup$

share|cite|improve this question

asked Apr 1 at 13:21

RoseRose

205

share|cite|improve this question

asked Apr 1 at 13:21

RoseRose

205

asked Apr 1 at 13:21

RoseRose

205

asked Apr 1 at 13:21

RoseRose

205