Ребята, помогите. Срочно надо. ПРОШУ ВАС!!!

log(a)b=log(c)b/log(c)a log(a^n)(b^n)=log(a)b nlog(a)b=log(a)b^n ------------------------------------------------- a) log(6)4+log(6)9+1/log(6)4 *2log(6)2 +2=log(6)(4*9)+log(6)4/log(6)4+2= =log(6)36+1+2=2+3=5 б) log(2)10+log(2)12-log(2)30 +4=log(2)(10*12/30)+4=log(2)4+4=2+4=6 в) log(2)6+log(2)10-log(2)15+2^log(2)5=log(2)(6*10/15)+5=log(2)4+5=2+5=7