Find the indicated terms in each of the following sequences whose nth terms are: `a_n=5_n-4; a_(12)a n da_(15)` `a_n=(3n-2)/(4n+5); a+7a n da_8` `a_n=n(n-1); a_5a n da_8` `a_n=(n-1)(2-n)3+n); a_1,a_2,a_3` `a_n=(-1)^n ; a_3,a_5, a_8`

Explanation

`(i)a_n=5n-4`

`a_(12)=5(12)-4=54`

`a_(15)=5(15)-4=71`



`(ii)a_n=(3n-2)/(4n+5)`

`a_7=(3xx7-2)/(4xx7+5)=(19)/(33)`

`a_8=(3xx8-2)/(4xx8+5)=(22)/(37)`

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