Rewrite using MathObjects and PGML #1178
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The problem uses 'cmp_str' to check for answer 'infinity'. The `cmp_str` is deprecated, and does not work well with the MathQuill editor. In addition to rewriting in PGML, a solution was added as well.
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This should fix another instance of #1000 |
| The function [`f(x)=(x+[$a])^2`] is not one-to-one. Choose a largest possible | ||
| domain containing the number 100 so that the function restricted to the domain is one-to-one. | ||
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| The largest possible domain is [`\left[\strut\right.`][________]{$ans1},[________]{$ans2}[`\left.\strut\right)`]. |
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This would be cleaner using the Interval context.
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I was thinking about it, but did not want to make too large changes to the problem.
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IMO there is no such thing as too large of changes. If there are places where the problem can be improved while still effectively asking the same question then I say go for it.
| $ans3 = Formula("sqrt(x)-$a"); | ||
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| BEGIN_PGML | ||
| The function [`f(x)=(x+[$a])^2`] is not one-to-one. Choose a largest possible |
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There is a unique largest possible domain containing 100, so how about changing this to "Choose the largest possible domain..."
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| The largest possible domain is [`\left[\strut\right.`][________]{$ans1},[________]{$ans2}[`\left.\strut\right)`]. | ||
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| The inverse function is [`g(x)=`][_______________]{$ans3}. |
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This should specify that it is asking for the inverse function on the domain given above. How about "If x is restricted to the above domain, then the inverse function is "?
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Sure, that is definitely better.
| ANS(str_cmp($ans2)); | ||
| ANS(fun_cmp($ans3)); | ||
| Solving the equation [`y=(x+[$a])^2`] for [`x`] will give us two solutions: [`x = \pm\sqrt{y} - [$a]`]. | ||
| According to our domain choice, [`x \ge [$ans1]`], which means we have to choose the solution with [`+`]. |
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line 53: replace $ans1 with $a
| The function [`f(x)=(x+[$a])^2`] is not one-to-one. Choose the largest possible | ||
| domain containing the number 100 so that the function restricted to the domain is one-to-one. | ||
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| The largest possible domain is [_________________]{$ansInt} (use interval notation). |
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line 43: replace "interval notation" with [@ helpLink("interval","interval notation") @]*
(including the star at the end!) This will create a link that points to instructions for entering intervals into webwork.
The problem uses 'cmp_str' to check for answer 'infinity'. The
cmp_stris deprecated, and does not work well with the MathQuill editor.In addition to rewriting in PGML, a solution was added as well.