Difference between revisions of "Formula plotting-students"

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Equations and inequalities are entered using =, <, >, >=, <= signs:
 
Equations and inequalities are entered using =, <, >, >=, <= signs:
  
   {{{ x = sqrt( y^2+1 ) }}}
+
   {{{ x = sqrt( y^2 1 ) }}}
   {{{ x >= sqrt( y^2+1 ) }}}
+
   {{{ x >= sqrt( y^2 1 ) }}}
   {{{ x <= sqrt( y^2+1 ) }}}
+
   {{{ x <= sqrt( y^2 1 ) }}}
   {{{ x >= sqrt( y^2+1 ) }}}
+
   {{{ x >= sqrt( y^2 1 ) }}}
  
'''Use parentheses ( and ) properly!'''. Rememver the a+b/c+d means something else than (a+b)/(c+d)!
+
'''Use parentheses ( and ) properly!'''. Rememver the a b/c d means something else than (a b)/(c d)!
  
 
Examples:
 
Examples:
  
   (a+b)/(c+d)        <--- a plus b, DIVIDED by c plus d
+
   (a b)/(c d)        <--- a plus b, DIVIDED by c plus d
 
   (x^2-1)/(x-1)
 
   (x^2-1)/(x-1)
 
   sqrt( 28 )            <--- square root of 28
 
   sqrt( 28 )            <--- square root of 28
   sin( x ) + cos( x )          <--- sine function of x plus cosine of x
+
   sin( x )   cos( x )          <--- sine function of x plus cosine of x

Revision as of 05:27, 18 April 2007


Most websites use forums that are not suitable for math and make it very difficult to enter formulas in questions and in text. Not so on Algebra.Com.

When you submit a question, you can use powerful formula notation, if you want to. You only need to know a few things about this huge system.

Enclose formulas into {{{ }}}. If you get stuck entering a valid formula, just remove {{{ and }}} and let the tutors figure it out. But your problem looks much better when formulas are displayed as they would be on your school blackboard.

Squares and powers are entered using the CARET symbol:

{{{ x^2-2x-3 }}}
{{{ x^y }}}

Square root is entered using the sqrt function notation

 {{{ sqrt( b^2-4ac ) }}}

Logarithm is entered using "log" function notation

 {{{ log( 2, x ) }}}   <-- logarithm of x with base 2
 {{{ log( y ) }}}      <-- logarithm of y without base

Multiplication is entered using *, division is entered using /.

Equations and inequalities are entered using =, <, >, >=, <= signs:

 {{{ x = sqrt( y^2 1 ) }}}
 {{{ x >= sqrt( y^2 1 ) }}}
 {{{ x <= sqrt( y^2 1 ) }}}
 {{{ x >= sqrt( y^2 1 ) }}}

Use parentheses ( and ) properly!. Rememver the a b/c d means something else than (a b)/(c d)!

Examples:

 (a b)/(c d)        <--- a plus b, DIVIDED by c plus d
 (x^2-1)/(x-1)
 sqrt( 28 )             <--- square root of 28
 sin( x )   cos( x )          <--- sine function of x plus cosine of x