Find the ninth term of the
geometric sequence, given the
first term and common ratio.
a1=1 and r=-1/3

=0.00015241579

Step-by-step explanation:

Use the formula for geometric sequences:

=

Substitute 1 in for , -1/3 in for r, and 9 in for n

=(1)(-1/3^9-1)

=(1)(-1/3^8)

=(1)(0.00015241579)

=0.00015241579

Hope this helps! :)

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hope this .. : d

u rich

step-by-step explanation: