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Math question at job interview
- Thread starter filipwa
- Start date
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I went for a job interview for an engineering position. There was a test and one of the questions was the following:
Show that x"(t)x(t)=0.5x'(t).
Can anyone explain to me how this is done?
Cheers!
In the absence of any other information, this question does not make sense to me.....
I went for a job interview for an engineering position. There was a test and one of the questions was the following:
Show that x"(t)x(t)=0.5x'(t).
Can anyone explain to me how this is done?
Cheers!
As Subhotosh Khan said. What if x(t)=t, then obviously it it not a true statement.
As Subhotosh Khan said. What if x(t)=t, then obviously it it not a true statement.
Sorry, it should have been like this x"(t)x(t)=0.5x'(t)^2. newWhich would still not hold true if x(t)=t.
As Subhotosh Khan said. What if x(t)=t, then obviously it it not a true statement.
Sorry, the last part of the right hand side disappeared. Should have been x"(t)x(t)=0.5x'(t)^2. Edited and corrected.
As pointed out, if x(t)=t it can not be true. But if e.g. x(t)=t^2 it would be.