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    In the last line, why does the sign change from n<= to n>= ?
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    In the last line, why does the sign change from n<= to n>= ?
    Because log(0.972) is negative, and they've thus divided by a negative number.
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    (Original post by zomgleh)
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    In the last line, why does the sign change from n<= to n>= ?
    Because you have divided by a negative number.
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    Because log(x)<0
    When 0<=x<=1

    And when you divide an inequality by a negative number you flip the sign.
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    ah, silly me, thanks everyone.
 
 
 
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