Q. Given the substitutions ln2=a,ln3=b, and ln5=c, find the value of ln(342) in terms of a,b, and c.Answer:
Given Substitutions: We are given the substitutions ln2=a, ln3=b, and ln5=c. We need to express ln(342) using these substitutions.First, let's rewrite the expression using properties of logarithms and roots.ln(342)=ln(21/4)−ln(3)
Rewriting Expression: Now, we apply the power rule of logarithms, which states that ln(xy)=y⋅ln(x), to the first term.ln(241)=(41)⋅ln(2)Since ln2=a, we can substitute a in place of ln(2).(41)⋅ln(2)=(41)⋅a
Applying Power Rule: Next, we look at the second term, ln(3). We have been given that ln3=b, so we can directly substitute b for ln(3).ln(3)=b
Substituting Values: Now, we combine the two parts of the expression we have simplified: ln(342)=41⋅a−b
Combining Simplified Parts: This is the final expression for ln(342) in terms of a, b, and c. Note that c is not used in this expression because ln(5) does not appear in the original problem.