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| 1. |
(i) find coefficient of x^{5^{}} in (x^2-x-2)^5 (ii) if the number of non-negative integral solutions of 3x+y+z≤30 is N, N being a four digit number "abba" then what is the value of b-a |
| Answer» (i) find coefficient of x^{5^{}} in (x^2-x-2)^5 (ii) if the number of non-negative integral solutions of 3x+y+z≤30 is N, N being a four digit number "abba" then what is the value of b-a | |