2.(2)→log y-log(8x+3)=0→y=8x+3
(1)→log x=log(40x+15)-2→log( (40x+15)/x )=2→(40x+15)/x=10^2→x=¼→y=5
(log)
(log)
1.solve the following exponential equation (use log if necessary)
8(6^(2x+5))=7^(3x-4)
2.solve the following simultaneous equations.
log x = log (5y) -2 ------- (1)
log y - 3 log ((8x+3)^(1/3)) =0 ------- (2)
1.solve the following exponential equation (use log if necessary)
8(6^(2x+5))=7^(3x-4)
2.solve the following simultaneous equations.
log x = log (5y) -2 ------- (1)
log y - 3 log ((8x+3)^(1/3)) =0 ------- (2)
数学人气:194 ℃时间:2019-10-09 11:49:54
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