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28. If graph ofxy=1 is reflected in y = 2x to give the graph 12x^2+rxy+sy^2+=0, then(a) r=7(c) r 25(b) s=-12(d) r + s =-192 |
| Answer» 28. If graph ofxy=1 is reflected in y = 2x to give the graph 12x^2+rxy+sy^2+=0, then(a) r=7(c) r 25(b) s=-12(d) r + s =-192 | |