log 7 sqrt 7
answer = 1/2
how???
2007-11-09 13:57:12 · 3 answers · asked by B K 1 in Science & Mathematics ➔ Mathematics
Remember that the square root is the same as the exponent of 1/2. Therefore you have log7 7^1/2. Bring that exponent around to the front and log base 7 of 7 = 1. So you have 1/2 x 1 = 1/2.
That's it!
2007-11-09 14:00:57 · answer #1 · answered by Marley K 7 · 0⤊ 0⤋
I think it's because square root is like squaring 7 to the 1/2 power and the log of 7 cancels the base of 7 and just leaves the power 1/2.
2007-11-09 22:00:36 · answer #2 · answered by sweetmisery870 2 · 0⤊ 0⤋
Something is missing.
log(7) * sqrt (7) =2.235919247
log (7) =0.84509804
sqrt (7) =2.645751311
log (7*sqrt(7)) = 1.26764706
ln(7)=1.945910149 (natural log)
I see no combination of addition, subtraction, division, multiplication , or exponents that will yield an answer of 1/2. Some bit of information is missing.
D.bumstead
2007-11-09 22:23:24 · answer #3 · answered by d.bumstead@sbcglobal.net 3 · 0⤊ 0⤋