Question

rezolva in R ecuatia. Va rog mult!!!!
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Answer 1

Răspuns:

x = 3

Explicație pas cu pas:

log₂(x+1) - log₂(x-1) = 1  

Conditii x+1 > 0 ; x-1 > 0 => x > 1

<=> log₂[(x+1)/(x-1)] = log₂2 =>

(x+1)/(x-1) = 2 =>

x+1 = 2(x-1) =>

x+1 = 2x-2 => x = 3 = solutie