how do i work out the nth term for a geometric sequnce decreasing in value 300, 200, 133 & a third

can anyone also pls workout the 15th term?

does anyone also have a formula(and answer) to calculate the sum of the first n terms? ... pls
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1 Answer

same anser as yesterdae

term (n+1)=(2/3)*term(n)

or=300*(2/3)^n-1
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