Hello Rosala, it is good to see you :)
I have played with this question for quite a while and it is driving me nuts LOL
I'd be interested to see someone else answer this or if you get an answer at college I would like to see that too :)
"The ratio of the sum of n terms of 2 APs is 3n + 1 : 4n + 3 . Find the ratio of their mth terms.."
How about as follows: