Which one of the following is not correct?

a) log_{20}1 = 0 b) log_{a}a = 1

c) log(1 + 2 + 3)= log1+log2+log3 d) log(a+b)=log a+log b

Which one of the following is not correct?

a) log_{20}1 = 0 b) log_{a}a = 1

c) log(1 + 2 + 3)= log1+log2+log3 d) log(a+b)=log a+log b

1 Answer - 5876 Votes

3537

(a) as =0,

(b)

(c) log(1+2+3)=log(6)=log(1×2×3)=log 1+log2+log3

(d) log

as

∴ (d) is not correct.