Q. Evaluate.log85512Write your answer in simplest form.
Identify Value of Fifth Root: Identify the value of the fifth root of 512. The fifth root of a number is the value that, when raised to the power of 5, gives the original number. We know that 512 is 2 raised to the power of 9 (29), so we need to find a number that when raised to the power of 5 gives 29.
Calculate Fifth Root: Calculate the fifth root of 512. Since 512 is 29, we can write the fifth root of 512 as (29)1/5. Using the property of exponents that (am)1/n=am/n, we get (29)1/5=29/5=21+4/5=2×24/5.
Simplify Expression: Simplify the expression 2×24/5.Since 2 is just 21, we can combine the exponents by adding them when multiplying the same base. Therefore, 2×24/5=21+4/5=29/5.
Rewrite with Simplified Expression: Rewrite the logarithm with the simplified expression.Now we have log8259. We can use the change of base formula for logarithms, which states that logab=logcalogcb. We will use base 2 for this transformation.
Apply Change of Base: Apply the change of base formula.Using the change of base formula, we get log8259=log28log2259.
Simplify Logarithms: Simplify the logarithms.Since the base and the argument of the first logarithm are the same (base 2), log2259 simplifies to 59. For the second logarithm, 8 is 23, so log28 simplifies to 3.
Complete Division: Complete the division.Now we have (59)/3. To divide a fraction by a whole number, we multiply the fraction by the reciprocal of the whole number. So, (59)/3=(59)×(31)=159=53.
Write Final Answer: Write the final answer.The value of log85512 is 53.