perplexus.info :: Sequences : Eight Product Exercise

Eight Product Exercise (Posted on 2015-03-02)

A sequence {A(n)} for n = 1 to 8 is defined as:
A(1) = 2015, A(2) = 2/A(1), A(3) = 3/A(2), .....
A(7) = 7/A(6) and A(8) = 8/A(7)

Find A(1)*A(2)*....*A(8)

See The Solution Submitted by K Sengupta

Rating: 4.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

short solution

| Comment 1 of 2

A(1) = 2015,

A(2) = 2/A(1),

A(3) = 3/A(2),

(A(1) *A(2) = 2;

A(3) * A(4) =4, etc

So the product is 2*4*6*8=16*24=384

Posted by Ady TZIDON on 2015-03-02 10:06:15

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