Mathematics
Senior High
画像の線を引いている問題について、2^xは0より大きいという条件をつけなくて良いのは何故ですか?
(2) 22x-2x+1-48<0
(3) log2(x-1)+log2(x-2)=2
2
4
(1)
0**.**<*
2π
(2)
x<3
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