Express the Sum Using Summation Notation $$a + a r + a r ^ { 2 } + \ldots + a r ^ { 14 }$$

question 50

Multiple Choice

Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.
- $$a + a r + a r ^ { 2 } + \ldots + a r ^ { 14 }$$

• A) \(\sum _ { \mathrm { i } = 1 } ^ { 14 } a r ^ { \mathrm { i } }\)
• B) \(\sum _ { \mathrm { i } = 1 } ^ { 14 } ( \mathrm { ar } ) ^ { \mathrm { i } }\)
• C) \(\sum _ { i = 1 } ^ { 15 } a r ^ { i-1 } \)
• D) \(\sum _ { \mathrm { i } = 1 } ^ { 14 } ( \mathrm { ar } ) ^ { \mathrm { i } - 1 }\)

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