
Re: MIT Math Diagnostic for Physics Placement
Posted:
Oct 24, 2012 10:51 AM


Dave L. Renfro wrote (in part):
http://mathforum.org/kb/message.jspa?messageID=7910806
> Problem A1: They should say that k is an integer. Otherwise, > a correct answer would be (1/2) x 10^(log 2x), where x equals > the given numerical expression.
I just noticed that they explicitly said 'A' (the mantissa) was to be greater than or equal to 1 and less than 10. OK, then even in that case there are uncountably many correct answers:
For each real number A such that 1 <= A < 10 (e.g. A = 1), use
A x 10^[(log y/A)],
where y equals the given numerical expression.
Dave L. Renfro

