Answers

2015-07-18T23:40:18+08:00
An=a1+(n-1)d
33=-17+(n-1)5
33=-17+5n-5
33=-22+5n
33+22=5n
55=5n
divide both sides by 5
55÷5=5n÷5
11=n

hope this will help :)
0
yes
why?
uhmm nothing :)
pls answer this 1,1 1/4,1 1/2,.....,9 3/4 find n
and this 83,80,77,......,5 find n