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find an explicit formula from a recursive sequence 

bprp calculus basics
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I would to show you a general strategy for figuring out an explicit formula when we are given a sequence defined recursively. Solving linear recurrence relations is usually taught in discrete math but we are seeing an introduction in precalculus. This method of finding an explicit formula from a recursive sequence should be what you should try first!
0:00 geometric sequence a_n=2a_(n-1)
2:56 arithematic sequence a_n=a_(n-1)+3
5:20 "both" a_n=2a_(n-1)+3
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"Just Calculus" is dedicated to helping students who are taking precalculus, AP calculus, GCSE, A-Level, year 12 maths, college calculus, or high school calculus. Topics include functions, limits, indeterminate forms, derivatives, and their applications, integration techniques and their applications, separable differential equations, sequences, series convergence test, power series a lot more. Feel free to leave calculus questions in the comment section and subscribe for future videos 👉 bit.ly/just_calc
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29 июн 2024

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Комментарии : 16   
@mathboy8188
@mathboy8188 2 года назад
Glad to see that you're explaining recursions! I'd say it's the most important topic that isn't sufficiently emphasized during most pre-Calc through Calc course sequences.
@LeviATallaksen
@LeviATallaksen 2 года назад
Interestingly, this method didn't show up in 5 years of studying maths, but it did in 1 year of studying programming. We applied it to find the running time for some algorithms.
@ericluz6054
@ericluz6054 2 года назад
I've learned how to solve recursions at Kumon. Pretty nice. Thanks for the video
@hank1519
@hank1519 Месяц назад
Excellent explanation! Thank you!
@mathsandsciencechannel
@mathsandsciencechannel 2 года назад
Great video sir. Always on point
@fivestar5855
@fivestar5855 2 года назад
Firstly I've thought about Fibonacci sequence in the last question, but it's actually 2 to the n+1 - 3.
@skwbusaidi
@skwbusaidi 2 года назад
We can use generating function
@gurkiratsingh7tha993
@gurkiratsingh7tha993 2 года назад
Nice trick, nobody taught me this before
@imabird1566
@imabird1566 Год назад
The pokeball plush made this really easy to learn thank you.
@MathSolvingChannel
@MathSolvingChannel 2 года назад
General solution = c1*homogeneous solution + particular solution 😉 where c1 is determined by initial condition
@cobalt4805
@cobalt4805 Год назад
What about when a sub (n-1) appears twice or more?
@michaeldouhji3396
@michaeldouhji3396 2 года назад
There is an easier way to solve the recursive sequences (the recursive definition should only be (ax+b)) So you have to solve (ax+b=x) and let the solution be (L) Then just use this formula: (A0 - L)a(to the power of n) + L (A0 is the first term of the sequence)
@Shaan11s
@Shaan11s Год назад
love the beard 🔥
@priyanshugoel3030
@priyanshugoel3030 2 года назад
Wont it require a n>=3 n>=4 . . . n>=n Or something like that.
@priyanshugoel3030
@priyanshugoel3030 2 года назад
Beacause an for n=0 is not defined
2 года назад
What's up with your beard bro? Nobadys gonna comment? Appears and disappears🤣
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