Identify Given Expression: Identify the given expression and the properties of logarithms that can be applied.The given expression is ln(e1). We can use the property that ln(x1)=−ln(x) and that ln(x21)=21ln(x).
Apply Logarithm Property: Apply the logarithm property to the expression.Using the property ln(x1)=−ln(x), we can rewrite ln(e1) as −ln(e).
Simplify Inside Logarithm: Simplify the expression inside the logarithm.Since e is the same as e(1/2), we can rewrite −ln(e) as −ln(e(1/2)).
Apply Power Rule: Apply the logarithm power rule.Using the power rule ln(xa)=a⋅ln(x), we can simplify −ln(e21) to −(21)ln(e).
Simplify Logarithm: Simplify the logarithm of the base e.Since ln(e) is equal to 1, we can simplify −(21)ln(e) to −(21)⋅1.
Calculate Final Value: Calculate the final value.Multiplying −21 by 1 gives us −21.