joy1 Posted April 30, 2012 Share Posted April 30, 2012 (edited) 1)in mathematics a0 =1 , when a not equal to zero. My question is how ' a multiplies 0 times is equal 1"?????? 2) vector a - vector a= null vector. What would be its direction?Is that a vector? 3) parameter of a circle is equals pi r 2 . why we use pi instead of a constant number 22/7????? Edited April 30, 2012 by hypervalent_iodine Superfluous code removed Link to comment Share on other sites More sharing options...
JohnStu Posted April 30, 2012 Share Posted April 30, 2012 (edited) 1)in mathematics a0 =1 , when a not equal to zero. My question is how ' a multiplies 0 times is equal 1"?????? 2) vector a - vector a= null vector. What would be its direction?Is that a vector? 3) parameter of a circle is equals pi r 2 . why we use pi instead of a constant number 22/7????? 1)the expression a0 =1 does not mean a multiply 0 times, but a divides itself one time. a0 = a / a = 1 Edited April 30, 2012 by hypervalent_iodine fixed code in quote Link to comment Share on other sites More sharing options...
ajb Posted April 30, 2012 Share Posted April 30, 2012 This post should probably be moved into the mathematics section, unless there is a reason why it has been posted here? 1)in mathematics a0 =1 , when a not equal to zero. My question is how ' a multiplies 0 times is equal 1"?????? You can prove that the statement is correct using what you know about the rules of exponents. A quick "google" will give you proofs. See if you can follow one, if not ask further questions here. 2) vector a - vector a= null vector. What would be its direction?Is that a vector? The direction is arbitrary. This courses no problems. 3) parameter of a circle is equals pi r 2 . why we use pi instead of a constant number 22/7????? [math]\pi[/math] has not be chosen by us, rather it is just the way things work out on the plane. The number 22/7 is a reasonable approximation to [math]\pi[/math] for may purposes, but cannot replace it fundamentally. Link to comment Share on other sites More sharing options...
hypervalent_iodine Posted April 30, 2012 Share Posted April 30, 2012 ! Moderator Note Agreed. I actually didn't see which forum it had been posted in, so thank you for pointing that out.Moved to mathematics. Link to comment Share on other sites More sharing options...
mathematic Posted April 30, 2012 Share Posted April 30, 2012 1)in mathematics a0 =1 , when a not equal to zero. My question is how ' a multiplies 0 times is equal 1"?????? 2) vector a - vector a= null vector. What would be its direction?Is that a vector? 3) parameter of a circle is equals pi r 2 . why we use pi instead of a constant number 22/7????? What do you mean by "parameter" in 3). The expression is for area. pi is a constant number. 22/7 is a simple approximate value, but it is not exact. Link to comment Share on other sites More sharing options...
Phi for All Posted April 30, 2012 Share Posted April 30, 2012 Where is the "funny"? The title promised me some funny! 2 Link to comment Share on other sites More sharing options...
Erudite Posted August 5, 2012 Share Posted August 5, 2012 Too Bad...! Link to comment Share on other sites More sharing options...
Greg H. Posted August 5, 2012 Share Posted August 5, 2012 Where is the "funny"? The title promised me some funny! Unfortunately PfA, in this case I believe that "funny" means "things I don't understand". I too was disappointed. Link to comment Share on other sites More sharing options...
Phi for All Posted August 5, 2012 Share Posted August 5, 2012 Too Bad...! You joined and made this your first post, and your username is "Erudite"? That's funny*. Thanks! And welcome! * Although it would have been funnier, given the section this is in, to have said, "2 Bad", or perhaps "2(Bad)". Link to comment Share on other sites More sharing options...
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