Khẳng định nào sau đây là đúng ?
A.\({\left( {{2^x}} \right)^y} = {2^x}{.2^y}\,\,\forall x,y \in \mathbb{R}\)
B.\({2^{x + y}} = {2^x} + {2^y}\,\,\forall x,y \in \mathbb{R}.\)
C.\({\left( {{2^x}} \right)^y} = {2^{xy}}\,\,\forall x,y \in \mathbb{R}.\)
D.\({2^{x - y}} = {2^x} - {2^y}\,\,\forall x,y \in \mathbb{R}.\)
A.\({\left( {{2^x}} \right)^y} = {2^x}{.2^y}\,\,\forall x,y \in \mathbb{R}\)
B.\({2^{x + y}} = {2^x} + {2^y}\,\,\forall x,y \in \mathbb{R}.\)
C.\({\left( {{2^x}} \right)^y} = {2^{xy}}\,\,\forall x,y \in \mathbb{R}.\)
D.\({2^{x - y}} = {2^x} - {2^y}\,\,\forall x,y \in \mathbb{R}.\)
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Hóa Học lớp 12
