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= +
=
=
c) - = - √a - ( + √x)
= 1 - √x - 1 - √x
= - 2 √x
= - (√x)²
= - ....atau ..
= .... atau ...
=
d) log √a + log √b - .log ab = log √a + log √b - log
= log √a + lob √b - (log √a + log √b)
= log √a + lob √b - log √a - log √b
= 0 ..atau ....
= log 1