Step-by-step explanation:
1. i think it's called ellipses
2.S(infinity)=a1/(1-r)
3. -1<r>1
4.r=a2/a1
r=1/2
5.S(infinity)=a1/(1-r)
=2/(1-1/2)
=2/(2-1/2)
=2/1/
=(2/1)(1/2)
=2/2
S(infinity)=1
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Answers & Comments
Step-by-step explanation:
1. i think it's called ellipses
2.S(infinity)=a1/(1-r)
3. -1<r>1
4.r=a2/a1
r=1/2
5.S(infinity)=a1/(1-r)
=2/(1-1/2)
=2/(2-1/2)
=2/1/
=(2/1)(1/2)
=2/2
S(infinity)=1