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03.08.2019 •
Mathematics
What is the fourth term of the sequence defined by a1 3xy 5 an y )an 1? (1) 12x 3 y 3 (3) 24x 4 y 2 (2) 24x 2 y 4 (4) 48x 5 y 1?
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Ответ:
a1=3xy^ 5
an= (2x/ y )a(n-1)
then
a2=(2x/ y )a(1)= (2x/ y )* 3xy^ 5=6(x^ 2)(y^ 4)
a2=6(x^ 2)(y^ 4)
a3=(2x/ y )a(2)= (2x/ y )* 6(x^ 2)(y^ 4)=12(x^ 3)(y^ 3)
a3=12(x^ 3)(y^ 3)
a4=(2x/ y )a(3)=(2x/ y )*12(x^ 3)(y^ 3)=24(x^ 4)(y^ 2)
The answer is a4=24(x^ 4)(y^ 2)
Ответ:
Option(A)
The probability that exactly 5 of the 10 individuals sampled will vote yes for the proposal is 0.246094 which is approx 0.25
Explanation:
We are given the probability the voter will vote yes is 50% and we have to find the probability that exactly 5 out of 10 individuals sampled will vote yes which is given by
and 0.246094 is the nearest value hence it is the required answer.