Write a formula for this sequence: 1/5, 3/5, 1, 1 2/5...
Answer

-1/5 + 2/5 n

1/5 + 2/5 n

1 2/5 - 2/5 n

Question

Write a formula for this sequence: 1/5, 3/5, 1, 1 2/5...
Answer
		
-1/5 + 2/5 n
		
1/5 + 2/5 n
		
1 2/5 - 2/5 n

anonymous · Answer

Each successive term gets bigger by 2/5, right?

anonymous · Answer

And the sequence starts with 1/5

anonymous · Answer

1/5 +2/5n

anonymous · Answer

Right!

anonymous · Answer

grow a chest u manorexic guy

hartnn · Answer

its -1/5 + 2/5 n !!

anonymous · Answer

@hartnn, why would you start with -1/5 ?  I don't follow...

hartnn · Answer

an=a+(n-1)d
a=1st term=1/5
d=common difference=2/5
an=1/5 + (n-1)*(2/5) = 1/5 +2/5  n - 2/5  = -1/5 + 2n/5

anonymous · Answer

Oh... it's because the expression I ended up with gives the incorrect answer for term n=1.  I was thinking about terms after 1/5 being the sequence , but the "normal" way (i.e. "correct" ;)  ) is to call the first term the n=1 term.  You're right... good catch!

anonymous · Answer

@dnance Check your sequence question again... @hartnn has the correct answer... I messed it up earlier... sorry!!