Răspuns:
b) log x=log 5×24÷6=10
log x=log 2
c) nu știu
3)
z1+z2=7-3i+8+4i=15+i
z1×z2=(7-3i)(8+4i)=56+28i-24i-12×(-1)=56+4i+12=68+4i
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z1=7+3i
_
z2=8-4i
_ _
z2-z1=8-4i-7+3i=1-i
|z1|=radical din 7²+(-3)²=rad 49+9=rad58
|z2|=rad8²+4²=rad64+16=rad80
|z1|+|z2|=rad58×rad80=rad4640
