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Find the sum to n terms of each of the series in Exercises 1 to 7 1: 1x2+2x3+3 x4 4 x5+2. 1 x2 x 3+2 x3 4+34 3. 3 x 1 +5 x 22 +7 x3 +... 5. 5+6+72 + 20 Ix2 2x3 3x4 3x8+6x11+9x14 + 6, |
| Answer» Find the sum to n terms of each of the series in Exercises 1 to 7 1: 1x2+2x3+3 x4 4 x5+2. 1 x2 x 3+2 x3 4+34 3. 3 x 1 +5 x 22 +7 x3 +... 5. 5+6+72 + 20 Ix2 2x3 3x4 3x8+6x11+9x14 + 6, | |