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  • Find the indicated terms in each of the sequences in Exercises 7 to 10 whose nth terms are: a n =- 1 ^ n- 1 n^3

9.   Find the indicated terms in each of the sequences in Exercises 7 to 10 whose nth terms are:

      a _ n = ( -1) ^{n-1} n ^ 3 , a _9 

Answers (1)

best_answer

Given : a _ n = ( -1) ^{n-1} n ^ 3

Put n =9,

a _ 9 = ( -1) ^{9-1} 9 ^ 3= (1).(729)=729

The value of a _ 9 =729

 

Posted by

seema garhwal

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