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Write the Sum Without Using Sigma Notation n=110n2n\sum _ { n = 1 } ^ { 10 } n \cdot 2 ^ { n }

Question 68

Multiple Choice

Write the sum without using sigma notation. n=110n2n\sum _ { n = 1 } ^ { 10 } n \cdot 2 ^ { n }


A) 21+22+23++2102 ^ { 1 } + 2 ^ { 2 } + 2 ^ { 3 } + \ldots + 2 ^ { 10 }
B) 141+242+343++104101 \cdot 4 ^ { 1 } + 2 \cdot 4 ^ { 2 } + 3 \cdot 4 ^ { 3 } + \ldots + 10 \cdot 4 ^ { 10 }
C) 121+222+323++102101 \cdot 2 ^ { 1 } + 2 \cdot 2 ^ { 2 } + 3 \cdot 2 ^ { 3 } + \ldots + 10 \cdot 2 ^ { 10 }
D) 121+232+343++102101 \cdot 2 ^ { 1 } + 2 \cdot 3 ^ { 2 } + 3 \cdot 4 ^ { 3 } + \ldots + 10 \cdot 2 ^ { 10 }
E) none of these

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