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Need help on number 15 and 16 pleasee

Need help on number 15 and 16 pleasee-example-1

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Answer:

15) Let n = 1 be the first term of each sequence.


- 65536 * - 4 = 262144


a(n) = 262144( - { (1)/(4)) }^(n)


a(9) = ( {4}^(9) ) {( - (1)/(4) )}^(9) = {( - 1)}^(9) = - 1

16)


6 / (- 3 )= - 2


a(n )= ( - 2) ({( - 3)}^(n) )


a(9) = - 2(( { - 3)}^(9) )


a(9) = - 2 * - 19683 = 39366

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