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1. |
Find positive no. x which satisfy the equation ` log_3 x * log_4 x (log_5 x -1) = log_5 x*(log_4 x+ log_3 x)` |
Answer» `log_3^xlog_4^x(log_5^x-1)=log_5^x(log_4^x+log_3^x)` `log_3^xlog_4^xlog_5^x-log_3^xlog_4^x=log_5^xlog_4^x+log_5^xlog_3^x` divide by`log_3^xlog_4^xlog_5^x` `1=1/log_5^x+1/log_3^x+1/log_4^x` `1=log_x^(5*4*3)` `1=log_x^60` `x=60,1`. |
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