Find the Common Difference of the Sequence $$a _ { 1 } = 6 , a _ { 4 } = 18 \text {; find } d$$

question 181

Multiple Choice

Find the common difference of the sequence.
- $$a _ { 1 } = 6 , a _ { 4 } = 18 \text {; find } d$$

• A)-4
• B)-12
• C)12
• D)4

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