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I x-4 I ≤3
x-4 ≥ -3 x-4≤3
x≥-3+4 x≤3+4
x≥1 x≤7
x∈ <1;7>
odp. D
2]
2 log 2+ log 15 - log 6=log( 2²*15 ; 6)= log 10=1
2 log 2= log 2²=log 4
log a + log b= log( a*b)
log a- log c= log ( a :c)