Sum of an infinite geometric sequence with the common ratio r, and the first term a1 is

we notice
-2 times -1/4=1/2,
1/2 times -1/4=-1/8
so a1=-2
r=-1/4 or -0.25
so the sum is

=

=

=

=
the sum is -8/5 or -1.6
Answer:
8 groups
Step-by-step explanation:
just keep taking away 18 till u can't anymore
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Answer:
7/4
Step-by-step explanation:
Answer:
The statement, one fifth of the square of a number is written as

Hope this helps you
You would use the sine rule. This is because the sine rule is when you know two of the angles on any triangle.
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