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    				| 1. | If `y="("x+sqrt(1+x^(1)")"^(n))`, then `(1+x^(2))(d^(2)y)/(dx^(2))+x(dy)/(dx)` is equal toA. `n^(2)y`B. `-n^(2)y`C. `-y`D. `2n^(2)y` | 
| Answer» Correct Answer - A | |