Rakesh and Tessa were asked to find an explicit formula for the sequence 100, 50, 25, 12.5,..., where the first term should be

Question

Rakesh and Tessa were asked to find an explicit formula for the sequence 100, 50, 25, 12.5,..., where the first term should be f(1).
Rakesh said the formula is f(n) = 100. (1/2)^n-1 and
Tessa said the formula is f(n) = 200.(1/2)^n-1
Which one of them is right?
Only Rakesh
Only Tessa
Both Rakesh and Tessa

Kunduz · Accepted Answer

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