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If P is the number of natural numbers whose logarithms to the base 10 have the the charecteristic p and Q is the numbers of natural numbers logarithms of whose reciprocal to the base 10 have the charecteristics -q. then find the value of `log_(10) P-log_(10) Q` |
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Answer» `10^p<=p<10^(p+1)` `p=10^(p+1)-10^p` `=10^p*q` `=9.10^p` Simialrly, `10^(q-1)ltQ<=10^q` `Q=10^q-10^(q-1)` `=9*10^(q-1)` `log_10^p-log_10^Q=log_10^(p/q)` `log_10((9*10^p)/(9*10^(q-1)))` `log_10 10^(p-q+1)=p-q+1`. |
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