How to insert text in Table
Displaying equations, how to combine strings and values without evaluating everything.
Reduction Integration of $I_n=\int{\frac{x^n}{\sqrt{x^2+a^2}} dx}$ How do I derive this using reduction formula?  $$I_n=\int{\frac{x^n}{\sqrt{x^2+a^2}} dx}$$  I got $\sqrt{x^2+a^2}(x^n) - \frac{1}{n-1}(x^{n-1})\sqrt{x^2+a^2} + \frac{1}{n-1}(I_n) $ . I'm not too sure if this is correct. I would appreciate any form of help or correction to my answer. Thank you. Display Blank when Referencing Blank Cell in Excel 2010 I have an Excel 2010 workbook that contains a number of individual worksheets. The cells on one of the sheets are linked to individual cells on two other worksheets in the same workbook.  I'm using a direct cell reference that essentially says that whatever value is entered into a particular cell on one sheet also populates cells on two other sheets.  I used the (=) function with the cell reference to accomplish this.  The issue I'm running into is that, even when the primary cell is left blank, the cells that populate from that primary cell will display 0, rather than remaining blank themselves.  I want the subordinate cells to remain blank if the primary cell they're linked to is blank. Moderators accepting answers on user's behalf after a certain time period I think it would be cool if a question would eventually open up to moderators to accept answers on the user's behalf, once a time period has passed. The asking user would get the rep score for the accept.  I know I've seen questions successfully answered with lots of upvotes and no accepted answer that sit there for months unaccepted. This would give superusers a little more functionality and would tie up a lot of loose ends.  What do you think? How to read a single character from the user? Conky does not work properly on Ubuntu 16.04 GNOME I have this strange problem with conky. It doesn't show properly on the desktop:    I've tried everything from editing conky widget file to reinstalling conky and conky manager (v.2.4). Who knows how to fix it? I have always argued adamantly, as long as the issue has been around, that gift should never be used as a verb. However, someone whose English knowledge I quite respect disagrees.  I’ve done some searching and I haven’t found a consensus; should gifting be shunned? How to force Windows 7 to ask for a "fresh" IP address from DHCP server? I'm troubleshooting a certain issue with my DHCP configuration, and need my Windows machine to ask for a "fresh" IP address, so I can see which address DHCP server gives by default.   When I do ipconfig /release followed by ipconfig /renew, Windows "proposes" its old IP address to the DHCP server (just checked with Wireshark, initial "DHCP Discover" message has Option-50 (requested IP address) with Windows machine's old IP).  Tried disabling/enabling network adapter. Same behavior.  Question: How can I force Windows to just ask for a new IP address, without proposing its old IP address. Computing the inverse of a permutation I didn't understand the permutation and of course, I got this question wrong.     Compute the inverse of the following permutation:   $$ \begin{pmatrix}  1&amp;2&amp;3&amp;4&amp;5&amp;6\\ 2&amp;5&amp;4&amp;1&amp;6&amp;3 \end{pmatrix} $$   Could you please help me with this question and provide an explanation?  Furthermore, is it possible to compute the direct permutation, not the inverse one? If yes, how?  Thank you in advance! Is there any way to attract or repel neutrons? I know that neutrons are neutral and have no charge, but is there any other way to interact with them? Rigid Simulation freezes at frame 250 Is there flair for Careers.SO? Are there any image badges like those on  for Careers.SO?         I would like to add a nice image to my website profile. Dual boot windows 8 and Ubuntu with Windows 8 Boot manager Why are news headlines in present tense if they refer to past events? In news papers we see headings like this  &quot;India signs a pact with Russia&quot; &quot;Sachin hits another century&quot; &quot;Obama wins presidential election&quot;  These are completed events, aren't they? Then, why are these sentences not mentioned in past tense? Upload files with HTTPWebrequest (multipart/form-data) How to prevent updating of a specific package? No more than 10,000 results are visible in search If you make a search for something that returns more than 10,000 items in result. For example, search for  return 161,338 results on MSE. But if you select a page where 10,000+ result should be shown:        In the edge case  shows zero results:        But this is actual for any page where per_page * page_number is more than 10,000.  Though this does not happen for Stack Overflow in English. It looks like all other sites are affected.  Related bug report on ruSO.meta: Word that describes being "patriotic" for something that is not a country? I'm looking for a word that is similar to patriotic but does not relate to one's country (or state).  For what it's worth, I'm specifically referring to "overly patriotic" in a negative sense, to describe someone who has a overly sentimental/cultural or otherwise less-than-rational attachment or devotion to something and makes it part of their very identity. A common example might be an extremely zealous football fan. I failed to open a lock. Now what? What is the difference between public, protected, package-private and private in Java? For the ring $\Bbb{Z}[\sqrt{d}]=\{a+b\sqrt{d}\mid a,b \in \Bbb{Z}\}$ where $d$ is not divisible by the square of a prime, prove that the norm $N(a+b\sqrt{d})= |a^2-db^2|$ satisfies the assertions: $N(x)=0$ if and only if $x=0$; $N(xy)=N(x)N(y)$ for all $x$ and $y$; $x$ is a unit if and only if $N(x)=1$; and if $N(x)$ is prime, then $x$ is irreducible in $\Bbb{Z}[\sqrt{d}]$.