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jvargas0207
29.09.2021 •
Mathematics
A pair of dice are rolled. Find the probability for P(Not 2 or Not 12).
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Ответ:
B
Step-by-step explanation:
Number of desired outcomes / Number of possible outcomes = Probability
1 outcome but 36 other possible results
= 1/36
Ответ:
I'm assuming the integral is
Rationalize the denominator:
Then the integral is
For the remaining integral, substitute x = sec(t ) and dx = sec(t ) tan(t ) dt. Then over an appropriate domain, we have
Integrate by parts, taking
u = tan(t ) ==> du = sec²(t ) dt
dv = sec(t ) tan(t ) dt ==> v = sec(t )
Then
Now for *this* remaining integral, integrate by parts again, taking
u = sec(t ) ==> du = sec(t ) tan(t ) dt
dv = sec²(t ) dt ==> v = tan(t )
so that
To summarize, if I denotes the original integral, we have
Putting everything back in terms of x, we have
sec(t ) = x
tan(t ) = √(x ² - 1)
so that