<span>Log(6) 4+log(6) 9+log(4) 6 * log(√6) 2+5^log5 2=
=log(6) (4*9)+log(4) 6*log(4) 2/log(4) </span>√6 +2=
=log(6) 36+2log(4) 6*log(4) 2/log(4) 6+2=2+2*1/2+2=2+1+2=5.
Точно не знаю, но как мне кажется 345,5 см
<span>1-3x+c-3xc/9x^2-6x+1= ((1-3х)</span>+с(1-3х))/(3х-1)<span>^2= (1+с)(</span>1-3х)/(3х-1)<span>^2= (1+с)/</span>(1-3х)
(tg+ctg)²-(tg-ctg)²=4
tg²+2tg*ctgx+ctg²-(tg²-2tg*ctg+ctg²)=4
tg²+2tg*ctg+ctg²-tg²+2tg*ctg-ctg²=4
4tg*ctg=4
(sin/cos)*(cos/sin)=1
1=1