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If $$2^x + 2^{x + 1} = 48$$, then the value of $$x^x$$ is
4
64
256
16
$$2^x\ +\ 2^x.2\ =48$$
$$2^x\ \left(1+2\right)\ =48$$
$$2^x\ =16$$
x=4
$$4^4=256$$
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