Post by: srxmos on July 05, 2016, 08:19:17 pm
Post by: crystallisation on July 05, 2016, 09:01:41 pm
I'm not sure if I did this right so I don't want to show you wrong working out haha
Post by: Escobar on July 05, 2016, 09:24:58 pm
[e]
i forgot to write a dx on the 2nd line
also, 'c' should not be needed as it asks for an antiderivative. however, i do not think they take marks off for including it
Post by: crystallisation on July 05, 2016, 09:31:33 pm
This is what I got
Post by: likeneverbefore on July 05, 2016, 09:35:55 pm
Post by: Sine on July 05, 2016, 11:25:29 pm
However marking schemes may change year by year so the most safe option is to write + c (shows the assessor you are aware of the constant of integration) and then say "therefore an antiderivitive is" _________ (answering the question directly).
Past years have indicated you don't need to say +c for "an antiderivitive" so just don't include it and assume 0
So the 'c' isnt necessary?
This is what I got
-c looks weird so i'd probably just change c to c1 -> c2 when manipulating :)
Also you changed c to -c but didn't change it when dividing by 3 it would be best to keep it consistent.
Not sure whether you would actually lose marks but you will definitely not lose marks if you just keep changing the c-c1,c2 .
Post by: srxmos on July 10, 2016, 01:52:57 pm
🏽🏽🏽