Question

Which expressions are equivalent to the one below? Check all that apply. log7 1• log5 25

A. 5•7

B. 2•log7 7

C. 1

D. 0

Answer 1

D. 0

Explanation:

hope this helps :)

Answer 2

D

Explanation:

Use logarithms properties:

`\log_a1=0\\ \\\log_aa=1\\ \\\log_ab^k=k\log_ab`

Now,

`\log_71=0\\ \\\log_525=\log_55^2=2\log_55=2\cdot 1=2`

and

`\log_71\cdot \log_525=0\cdot 2=0`

Hence, correct option is option D.