Помогите с логарифмами,пожалуйста
1)[tex] 7^{log _{7}3 } +log _{3}135- log_{3} 45 [/tex]
2)[tex](1+4 ^{log2 \sqrt{2} } ) ^{1/2} *cos \frac{13 \pi }{6} [/tex]
1)[tex] 7^{log _{7}3 } +log _{3}135- log_{3} 45 [/tex]
2)[tex](1+4 ^{log2 \sqrt{2} } ) ^{1/2} *cos \frac{13 \pi }{6} [/tex]
Answers & Comments
Verified answer
1=3+lg(3)(135/15)=3+log(3)9=3+2=5
2
(1+2^log(2)2)^1/2*cos(2π+π/6)=√(1+2)*cosπ/6)=√3*√3/2=3/2=1,5
--------------------------------------
a^log(a)b=b