SOLUTION: 1:find the n th of 3 -6 ,+9 -12.......... 2:find n term of -1+1/2 -1/3 1/4.........

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Question 1127653: 1:find the n th of 3 -6 ,+9 -12..........
2:find n term of -1+1/2 -1/3 1/4.........
Answer by ikleyn(52787) About Me  (Show Source):
You can put this solution on YOUR website!
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1:  find the n-th of 3, -6, +9, -12, . . . 


    ANSWER :  a%5Bn%5D = %28-1%29%5E%28n%2B1%29%2A%283n%29,  n= 1, 2, 3, 4, . . . 



        Notice that I  edited  your post by placing commas where they should be . . . 




2:  find the n-th term of -1, +1/2, -1/3,  1/4, . . . 


    ANSWER :  a%5Bn%5D = %28-1%29%5En%2A%281%2Fn%29,  n= 1, 2, 3, 4, . . . 


        Notice that I  edited  your post by placing commas where they should be . . .