log(2)5=a,log(2)7=b用ab表示log(35)28

log(2)5=a,log(2)7=b用ab表示log(35)28 已知log（14）7=a log(14)5=b 用ab表示log(35)70=log(3)4*log(4)8*log(8)m=log(4)2 求m log(8)a+log(4)b^2=5,log(8)b+log(4)a^2=7,求log(2)ab的值 关于数学对数的换底公式推论的问题已知 log(2)(3) = a,log(3(7)=b,用a,b表示log(42)(56)因为log(2)(3)=a,则1/a=log(3)(2),又∵log(3)(7)=b,∴log(42)(56)=log(3)(56)/log(3)(42)=log(3)(7)+3·log(3)(2)/log(3)(7)+log(3)(2)+1=ab+3/ab+b+1 关于数学对数的换底公式推论的问题已知 log(2)(3) = a,log(3(7)=b,用a,b表示log(42)(56)因为log(2)(3)=a,则1/a=log(3)(2),又∵log(3)(7)=b,∴log(42)(56)=log(3)(56)/log(3)(42)=log(3)(7)+3·log(3)(2)/log(3)(7)+log(3)(2)+1=ab+3/ab+b+1 已知log（3）2=a log（5）2=b用ab表示log（30)90 1、若lg2=a,lg3=b,则lg√15=?（用a、b表达）2、若log(15)(5)=m,则log(15)(3)=(用m表示)3、log(2)(3)*log(3)(4)*log(4)(5)*log(5)(6)*log(6)(7)*log(7)(8）=?4、设log(3)(2)=log(2)(3^x),x=?这个对数函数我学的很不好,所以希望过 用C语言计算log(5)log(3)-log(2))/sin(π/3)=#include #includeint main(){int a=5,b=3,c=2;double y;y=(log(a)log(b)-log(c))/sin(π/b);printf((log(5)log(3)-log(2))/sin(π/3)=%ld,y);return 0;}x这哪里错了? log那块的数学题已知lg2=a lg3=b 试用a b 表示log(12)5已知log(2)3=a log(3)7=b 试用a b表示log(14)56括号里是底 求等式log(2)3*log(3)4*log（4)5*log(5)6*log(6)7*log(7)m=log(3)9时m的值? 2log(b)x=log(a)x+log(c)x求证,c^2=(ac)^[log(a)b] 已知log(2)3=a,log(3)7=b试用a,b表示log(2)14 已知log(2)3=a,log(3)7=b,试用a,b表示log(14)56 设log(2)(3)=a,log(3)(7)=b,以a,b表示log(21)(56) 已知log(2)^3＝a,log（3）^5=b,试用a,b表示log(15)^20 对数函数题 log a - log b = 3 log (c/2) 求 a = ______________ a=log(3)π b=log(7)6 c=log(2)0.8 哪一个大, log（2）（a）=log（3）（b）=log（5）（c）