log2(√5 +1) + log2(√5-1)?

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2006-10-22 17:56:53 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help

log2(rt5-1)(rt5+1)
log2(5-1)
log2(4)
log2(2^2)
2log2(2)=2

2006-10-22 18:03:57 · answer #1 · answered by raj 7 · 0⤊ 0⤋

2^[log2(â5+1) + 2^log2(â5-1)] = 2^x
2^log2(â5+1) * 2^log2(â5-1) = 2^x
(â5+1)*(â5-1) = 2^x
5 - 1 = 2^x

2^x = 4

x = 2

2006-10-23 01:20:43 · answer #2 · answered by gp4rts 7 · 0⤊ 0⤋

answer is 4.

2006-10-23 01:01:28 · answer #3 · answered by FLORA 1 · 0⤊ 0⤋

LOG 8....AM NOT TOO SURE THOUGH!!

2006-10-23 01:00:05 · answer #4 · answered by nityachawla 1 · 0⤊ 0⤋