Hi. I'm not entirely sure that this is the appropriate section for this but I;m doing a calculus course now so I thought this may be where I need to post it. We recently started Riemann Sums and then we were given a few examples to do and I can't seem to figure this type out.
Find the sum of: ( 3*4 )+( 8*6 )+( 13*8 )+( 18*10 )+( 23*12 )+...( 98*42 )
I tried finding the sum of the product of the two series getting Σ[(5i-2)*(2i+2)] for 20 terms however I keep getting the incorrect answer - 29880 (the answers were given to us and is 25840)
If anyone could show me what I'm doing wrong, I'd appreciate it
Thanks in advance
Find the sum of: ( 3*4 )+( 8*6 )+( 13*8 )+( 18*10 )+( 23*12 )+...( 98*42 )
I tried finding the sum of the product of the two series getting Σ[(5i-2)*(2i+2)] for 20 terms however I keep getting the incorrect answer - 29880 (the answers were given to us and is 25840)
If anyone could show me what I'm doing wrong, I'd appreciate it
Thanks in advance