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| 1. |
Find a positive value of m for which the coefficient of( x)²in the expansion (1+x)m is 6 |
| Answer» x2 term is mc2.1m-2. x2we know 1 power anything is 1 so mc2=6m.(m-1)/2=6m2-m-12=0(m-4)(m+3)=0m=4,-3since m is positive so m=4 | |