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| 1. |
If the pth, qth, rth term of an AP be x, y, z respectively, show that x(q-r)+y(r-p)+z(p-q) = 0 |
| Answer» If the pth, qth, rth term of an AP be x, y, z respectively, show that x(q-r)+y(r-p)+z(p-q) = 0 | |