Math
posted by Anonymous on .
The sum to infinity of a G.P. is 16 and the sum of the first 4terms is 15. Find the first 4 terms.
Find the sum to infinity of the following (if they converge).
?(a)4+4/3+4/3²+...
(b)9+7+5+3+...(can't do, its an AP ?)
(c)2010+52.5+...a=20,r=0.5
?(d)5/10+5/100+5/1000+...
(e)p+p²+p³+...a=p,r=p
?(f)31+1/31/9+...
S(infinity)=1/(ar)

does b converge?
d. Denke, in decimals. 0.555555555555...