Q. Write the expression 21ln9+ln3 as a single logarithm in simplest form without any negative exponents.Answer: ln(□)
Apply Power Rule: We have the expression (21)ln9+ln3. To combine these logarithms into a single logarithm, we can use the logarithm properties.
Calculate Square Root: First, we apply the power rule of logarithms to the term (21)ln9, which states that a coefficient in front of a logarithm can be turned into an exponent inside the logarithm: a⋅ln(b)=ln(ba).(21)ln9=ln(9(21))
Combine Logarithms: We know that 921 is the square root of 9, which is 3. ln(921)=ln(3)
Calculate Product: Now we have ln(3)+ln(3). We can combine these using the product rule for logarithms, which states that ln(a)+ln(b)=ln(a×b).ln(3)+ln(3)=ln(3×3)
Final Simplification: We calculate the product inside the logarithm.3×3=9ln(3×3)=ln(9)
Final Simplification: We calculate the product inside the logarithm.3×3=9ln(3×3)=ln(9)The expression is now simplified to a single logarithm.ln(9)
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