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