Not necessarily. The domain could well be restricted and, in that case, so will the range.
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There are infinitely many sequence that will fit the above four numbers so there are infinitely many possible answers. For example, the sequence could be based on the rule Un = (-7n4 + 70n3 -233n2 + 338n - 168)/12 for n = 1, 2, 3, ... It is probably based on Un = n*(n+1) for n = 1, 2, 3, ...
A: Un+1 = Un + d is recursive with common difference d.B: Un+1 = Un * r is recursive with common ratio r.C: The definition seems incomplete.A: Un+1 = Un + d is recursive with common difference d.B: Un+1 = Un * r is recursive with common ratio r.C: The definition seems incomplete.A: Un+1 = Un + d is recursive with common difference d.B: Un+1 = Un * r is recursive with common ratio r.C: The definition seems incomplete.A: Un+1 = Un + d is recursive with common difference d.B: Un+1 = Un * r is recursive with common ratio r.C: The definition seems incomplete.
Given any number it is easy to find a rule based on a polynomial of order 6 such that the first six numbers are as listed in the question and the next is the given number. There are also non-polynomial solutions.The simplest rule, based on a polynomial of order 5, isUn = (-4n5 + 75n4 - 510n3 + 1665n2 - 2306n + 1440)/120 for n = 1, 2, 3, ...Another possibility is a Fibonacci-like sequence withU1 = 3, U2 = 4 and Un+2 = Un + Un+1 for n = 1, 2, 3, ...
To determine the percent of As-81 that remains un-decayed after 43.3 seconds, you would need to know its half-life. The half-life of As-81 is approximately 46.2 seconds. Given that 43.3 seconds is slightly less than one half-life, you can use the formula for exponential decay: [ N(t) = N_0 \left( \frac{1}{2} \right)^{t/T_{1/2}} ] where ( N_0 ) is the initial quantity, ( t ) is the elapsed time, and ( T_{1/2} ) is the half-life. After 43.3 seconds, about 80% of the original sample of As-81 would remain un-decayed.
Un-restricted submarine warfare
Velocity.
Vacanze per un massacro - 1980 is rated/received certificates of: Germany:BPjM Restricted
The announced resumption of un-restricted submarine warfare.
Germany announced plans to resume un-restricted sub warfare; they were warned not to do it.
San Fransisco
Sinking w/o warning (un-restricted submarine warfare).
Sinking civilian ships without warning (un-restricted submarine warfare).
Submarines kept sinking civilian ships; un-restricted submarine warfare.
Sinking of the Lusitania and breaking promises of un-restricted submarine warfare. Preventing U.S trade.
UN-Restricted sub warfare was conducted in both WWI & WWII, & in all oceans & by all major combatants (US, Japan, Germany, Britain, Russia, etc.): Atlantic Ocean, Pacific Ocean, Indian Ocean, etc. Un-restricted sub warfare simply meant, "not giving prior warning to the vessel to be sunk."
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