Edexcel A Level Maths: 3.8 Modelling with Series

[@iren6019]

i looked up your playlist for sequences and series to figure out a past paper question ... turns out the last question in this video is the same question! Two birds with one stone. Thanks to you i was able to revise this topic within 2 hrs thank you !

[@Mo-qs7wr]

Great video!

[@kpoplover0044]

😍😍 perfect video

[@salmana8821]

👍👌

[@soomart1513]

How did we get r = 1.08. I could not understand that

[@ACO_8]

100% + 8% = 108% divide that by 100% and it gives you 1.08

[@alaziziomar_]

ur cooked its over for u

[@superchito1000]

​@@alaziziomar_ nah bro ur wicked 😭

[@SaraBuga-u8p]

But 8 percent is 8 divided by 100 which is 0.08

[@AdrianaRio-o7x]

How did u get 59000

[@drmichaelmorbiusofficial5765]

Use n/2 * (a + L) with 'L' being the nth term at n=40, 'a' being the first term 500, and 'n' being 40. So it's just 20 * (500 + 50(40) + 450) which is 59000.