log(2,x) + log(4 ,−2x + 1) https://www.wolframalpha.com/input?i=log%282%2Cx%29+%2B+log%284+%2C%E2%88%922x+%2B+1%29+&lang=ja -(3 log(3))/log(4) https://www.wolframalpha.com/input?i=-%283+log%283%29%29%2Flog%284%29&lang=ja
log(2,x) + log(4 ,−2x + 1)
https://www.wolframalpha.com/input?i=log%282%2Cx%29+%2B+log%284+%2C%E2%88%922x+%2B+1%29+&lang=ja
-(3 log(3))/log(4)
https://www.wolframalpha.com/input?i=-%283+log%283%29%29%2Flog%284%29&lang=ja