Sum of 1+2+\[{{2}^{2}}\]+\[{{2}^{n-1}}\]is – McqOptions

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1.	Sum of 1+2+\[{{2}^{2}}\]+\[{{2}^{n-1}}\]is
A.	\[{{2}^{n}}\]
B.	\[{{2}^{n}}+1\]
C.	\[{{2}^{n}}-1\]
D.	\[{{2}^{n-1}}\]
Answer» D. \[{{2}^{n-1}}\]

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