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           ☆1 inequalities

[ 1/1Inequality]
    Assignment:Find the solution set of inequality C(8,k)×2^k ≥C(8,k-1)×2^(k-1) .
    Question type: Inequality
    Solution:
    The inequality can be reduced to 1 inequality：
         C( 8 , k ) × 2 ^ k ≥ C( 8 , k - 1 ) × 2 ^ ( k - 1 )         (1)

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    From inequality(1)：
         k ≤ -1082.746667 或  -1082.746667 ≤ k ≤ -1082.027778 或  -1082.027778 ≤ k ≤ -1081.308889 或  -1081.308889 ≤ k ≤ -108059/100 或  -108059/100 ≤ k ≤ -242971/225 或  -242971/225 ≤ k ≤ -971237/900 或  -971237/900 ≤ k ≤ -32353/30 或  -32353/30 ≤ k ≤ -969943/900 或  -969943/900 ≤ k ≤ -1076.995556 或  -1076.995556 ≤ k ≤ -1076.276667 或  k ≥ -1076.276667

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    The final solution set is :
         k ≤ -1082.746667 或  -1082.746667 ≤ k ≤ -1082.027778 或  -1082.027778 ≤ k ≤ -1081.308889 或  -1081.308889 ≤ k ≤ -108059/100 或  -108059/100 ≤ k ≤ -242971/225 或  -242971/225 ≤ k ≤ -971237/900 或  -971237/900 ≤ k ≤ -32353/30 或  -32353/30 ≤ k ≤ -969943/900 或  -969943/900 ≤ k ≤ -1076.995556 或  -1076.995556 ≤ k ≤ -1076.276667 或  k ≥ -1076.276667

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