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| 1. |
The 5th,8th and 11th terms of a G.P. are p,q and s respectively, show that q^2=ps. |
| Answer» A5= ar^4. Similarly , A8= ar^7 &. A11= ar^10. Since q =. A8 (A8)^2 = ( ar^7)^2. = (a^2)(r^14). ........(1). (LHS). (A5)(A11) = (ar^4)(ar^10). =. (a^2)(r^14). .......(2). (RHS) Since LHS = RHS , hence proved. | |