Question
Find sum of first n terms: 2 + 6 + 12 + 20 + 30 + …
More Series Questions
- If the first term of the arithmetic progression is 18, the common difference is 5, and the number of terms in the series are 40, then find the sum of the s...
- 6, 17, 21, 47, ?, 107
- 21 48 173 516 1245 2576 ?
- 1240 600 ? 140 90 25
- 61 71 86 ? 131 161
- 351 261 181 111 51 ?
- 12 13 30 99 412 ?
- 32, ?, 41, 68, 132, 257
- 3 2 2 3 8 ?
- 77 ? 190 257 331 412
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