Resposta:
Q.3
a) log 16 = log 2^4=4 * log 2 = 4 * 0,3 =1,2
b) log 24 = log 8 * 3
= log8 + log 3
= log 2³+ 3*log 2 + log 3
=3*0,3+0,47= 1,37
c) log 4 - log 18
=log 2² -log 3²*2
=2log 2 - 2*log 3 - log 2
=log 2-2*log 3
=0,3 - 2*0,47 = -0,64
Q.4
log₁₂ 3 + log₁₂ 4 = 1
log 3/log12 + log 4/log 12=1
log 3+log 4= log 12
log 3*4=log 12
log 12= log 12 ............. c.q.p.
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Resposta:
Q.3
a) log 16 = log 2^4=4 * log 2 = 4 * 0,3 =1,2
b) log 24 = log 8 * 3
= log8 + log 3
= log 2³+ 3*log 2 + log 3
=3*0,3+0,47= 1,37
c) log 4 - log 18
=log 2² -log 3²*2
=2log 2 - 2*log 3 - log 2
=log 2-2*log 3
=0,3 - 2*0,47 = -0,64
Q.4
log₁₂ 3 + log₁₂ 4 = 1
log 3/log12 + log 4/log 12=1
log 3+log 4= log 12
log 3*4=log 12
log 12= log 12 ............. c.q.p.