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FP1 - [Proof]

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    (Original post by AdeptDz)
    

2[3^{k+1}(k-1)] - 3^{k+1}(k-2)

2\times3^{k+1}(k-1) - 3^{k+1}(k-20)

3^{k+1}(2(k-1)-(k-2))

    there
    guessing if i expand that it should give me the answer
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    (Original post by AdeptDz)
    guessing if i expand that it should give me the answer
    Yes.
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    (Original post by NotNotBatman)
    Yes.
    ah finally i got it! Thanks.
    Going to try do one more for practice, would you mind helping me (if i get stuck again)
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    (Original post by AdeptDz)
    ah finally i got it! Thanks.
    Going to try do one more for practice, would you mind helping me (if i get stuck again)
    Sure, I wouldn't mind helping.
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    Lastly, is there like steps you have for doing that bit.or do you just know what to do through practice
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    (Original post by AdeptDz)
    Lastly, is there like steps you have for doing that bit.or do you just know what to do through practice
    Some practise. You should look at what you want in the final answer and try to work towards that. I usually do it separately, find 6U_{n+1} and simplify and then find 9U_{n} and simplify and then subtract them after the simplification, it was the technique I saw on MadAsMaths(By TeeEm) and it made it so much simpler for me.
    http://www.madasmaths.com/archive/ma..._induction.pdf
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    thanks
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    (Original post by NotNotBatman)
    Some practise. You should look at what you want in the final answer and try to work towards that. I usually do it separately, find 6U_{n+1} and simplify and then find 9U_{n} and simplify and then subtract them after the simplification, it was the technique I saw on MadAsMaths(By TeeEm) and it made it so much simpler for me.
    http://www.madasmaths.com/archive/ma..._induction.pdf
    ill check it out
 
 
 
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