GEOMETRICAL PROGRESSION. 



' 179 



5. Divide the dividend by the divisor, and the quotient 

 will be the term sought. 



Note. When the first term of the series is equal to 

 the ratio, the indices must begin vi'ith an unit, and the in- 

 dices added must make the entire index of the term re- 

 quired ; 



Case 



Giv. I Req. 



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8. 



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Solution. 



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Case 



