MCQOPTIONS
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| 1. |
If \[\sum\limits_{i=1}^{n}{i=\frac{n(n+1)}{2}}\], then \[\sum\limits_{i=1}^{n}{(3i-2)=}\] |
| A. | \[\frac{n(3n-1)}{2}\] |
| B. | \[\frac{n(3n+1)}{2}\] |
| C. | \[n(3n+2)\] |
| D. | \[\frac{n(3n+1)}{4}\] |
| Answer» B. \[\frac{n(3n+1)}{2}\] | |