Question

Qual é o valor de cada uma das expressões:

a) log6 8 - log4 1 + log3 4
b) log1/4 1/6 + log4 √7 - log3 2
c) log6 √3 - log8 + log3 6
d) 2.log7 5 - log2 8 + 3.log4 2
e) log5 √6 - log 1/5 0,5 + log 1/2 0,25
f) 5.log8 5 + log7 3 - log 1/3 6

PRECISO DO DESENVOLVIMENTO DAS CONTAS TAMBÉM POR FAVOR​

Answer 1

Resposta:

1)

a) log2(16) = log2(2^4) = 4log2(2) = 4

b) log4(16) = log4(4^2) = 2log4(4) = 2

c) log3(81) = log3(3^4) = 4log3(3) = 4

d) log5(125) = log5(5^3) = 3log5(5) = 3

e) log(100000) = log10(10^5) = 5log10(10) = 5

f) log8(64) = log8(8^2) = 2log8(8) = 2

g) log2(32) = log2(2^5) = 5log2(2) = 5

h) log6(216) = log6(6^3) = 3log6(6) = 3

2)

a) log2(1/4) = -2log(2)/log(2) = -2

b) log3(√3) = log3(3)/2 = 1/2

c) log8(16) = log(2^4)/log(2^3) = 4/3

d) log4(128) = log(2^7)/log(2^2) = 7/2

e) log36(√2) = log(2)/4log(6)

f) log(0.01) = log(1/100) = -2

g) log9(1/27) = -log(3^3)/log(3^2) = -3/2

h) log0.2(³√25) = log1/5(³√5^2) = -2/3log(5)/log(5) = -2/3

i) log1.25(0.64) = log5/4(64/100) = -log5/4((5/4)^2) = -2

j) log5/3(0.6) = log5/3(3/5) = -1

3)

A = log25(0.2) = log25(1/5) = -0.5

B = log7(49) = log(7^2)/log(7) = 2

C = log25(√8) = 0.323

D = log(0.1) = -1

em ordem crescente D, A, C, B

5) log5(5) + log3(1) - log(10) = 1 + 0 - 1 = 0

b) log1/4(4) + log4(1/4) = -1 -1 = -2

c) log(1000) + log(100) + log(10) + log(1) = 3 + 2 + 1 + 0 = 6

d) 3^log3(2) + 2^log2(3) = 2 + 3 = 5

e) log8(log3(9)) = log8(2) = 1/3

f) log9(log4(64)) + log4(log3(81)) = log9(3) + log4(4) = 1/2 + 1 = 3/2