I’m looking for the correct answer to correct my sons test. Thanks
M Mkstretch New member Joined Jan 23, 2020 Messages 2 Jan 23, 2020 #1 I’m looking for the correct answer to correct my sons test. Thanks
MarkFL Super Moderator Staff member Joined Nov 24, 2012 Messages 3,021 Jan 23, 2020 #2 Hello, and welcome to FMH! I would write: [MATH]a_1=5[/MATH] [MATH]a_2=3(5)-2=13[/MATH] [MATH]a_3=3(13)-2=37[/MATH] Just for your own information, the closed form for this sequence is: [MATH]a_n=4\cdot3^{n-1}+1[/MATH] This will allow you to compute any term in the sequence without having to know the prior term.
Hello, and welcome to FMH! I would write: [MATH]a_1=5[/MATH] [MATH]a_2=3(5)-2=13[/MATH] [MATH]a_3=3(13)-2=37[/MATH] Just for your own information, the closed form for this sequence is: [MATH]a_n=4\cdot3^{n-1}+1[/MATH] This will allow you to compute any term in the sequence without having to know the prior term.
pka Elite Member Joined Jan 29, 2005 Messages 11,986 Jan 23, 2020 #3 Have a look here. That is a great resource for free use.
M Mkstretch New member Joined Jan 23, 2020 Messages 2 Jan 23, 2020 #4 Thanks for the welcome! Also thank you both for the great information!!