Question

What condition must be ensured for an expression inside logarithm?

Options

• The expression inside logarithm equals zero

• The expression inside logarithm remains an integer

• The expression inside logarithm remains positive

• The expression inside logarithm remains negative

Answer 1

For real logarithms, the expression inside logarithm must remain positive. For instance, \[x>0\] is required when the expression contains \[\log x\].