loncom/homework/templates/SimpleFormula.problem - diff

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-version 1.4, 2004/08/19 20:29:22
+version 1.5, 2005/01/31 11:17:04
  Line 1
  <problem>
- <script type="loncapa/perl">$z=&random(1,10,1);
+ <script type="loncapa/perl">$k=&random(3,6,1);
- $constant=&random(1,10,1);
+ $formula="a*x^$k";
- # y=x+z-constant, solving for x, x=y-z+constant, prettyconstant is for simplifying
+ $m=$k-1;
- $prettyconstant=$constant-$z;
+ $derivative="$k*a*x^$m";</script>
- $x="y+$prettyconstant";
- # code below substitutes '+-' and '-+' for '-'.  This is used in display of answer
+ <startouttext />What is the derivative of <tt>$formula</tt> with respect to x?<endouttext />
- $x=~s/\+-/-/g;
- $x=~s/-\+/-/g;</script>
+ <formularesponse samples="a,x@-3,-3:3,3#4" answer="$derivative">
+     <responseparam description="Numerical Tolerance" type="tolerance" default="0.00001" name="tol" />
- <startouttext />If z=$z and y=x+z-$constant, what does x equal?
+     <textline size="25" />
- <endouttext />
+ </formularesponse>
- <formularesponse samples="y@-5:5#10" answer="$x">
+ </problem>
-     <responseparam description="Numerical Tolerance" type="tolerance" default="0.00001" name="tol" />
-     <textline size="25" />
- </formularesponse>
- </problem>