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If 
8^((5)/(6))-8^((1)/(2))=8^(m) for some value of 
m, what is the value of 
m ?
Choose 1 answer:
(A) 
(1)/(3)
(B) 
(1)/(2)
(C) 1
(D) 
(5)/(3)

If 856812=8m 8^{\frac{5}{6}}-8^{\frac{1}{2}}=8^{m} for some value of m m , what is the value of m m ?\newlineChoose 11 answer:\newline(A) 13 \frac{1}{3} \newline(B) 12 \frac{1}{2} \newline(C) 11\newline(D) 53 \frac{5}{3}

Full solution

Q. If 856812=8m 8^{\frac{5}{6}}-8^{\frac{1}{2}}=8^{m} for some value of m m , what is the value of m m ?\newlineChoose 11 answer:\newline(A) 13 \frac{1}{3} \newline(B) 12 \frac{1}{2} \newline(C) 11\newline(D) 53 \frac{5}{3}
  1. Recognize Base Property: Recognize that the base of all terms is 88, which allows us to use the properties of exponents to combine the terms.
  2. Rewrite Subtraction as Division: Rewrite the subtraction of the powers as a division of the same base using the property aman=am/ana^{m} - a^{n} = a^{m} / a^{n} when a > 0 and a1a \neq 1. \newline85/681/2=85/6/81/28^{5/6} - 8^{1/2} = 8^{5/6} / 8^{1/2}
  3. Apply Exponent Property: Apply the property of exponents that states am/an=amna^{m} / a^{n} = a^{m-n} to simplify the expression.\newline85/6/81/2=8(5/6)(1/2)8^{5/6} / 8^{1/2} = 8^{(5/6) - (1/2)}
  4. Find Common Denominator: Find a common denominator to subtract the fractions (56)(\frac{5}{6}) and (12)(\frac{1}{2}). The common denominator is 66, so we rewrite (12)(\frac{1}{2}) as (36)(\frac{3}{6}). 8(5636)8^{(\frac{5}{6} - \frac{3}{6})}
  5. Subtract Fractions: Subtract the fractions.\newline(56)(36)=(26)(\frac{5}{6}) - (\frac{3}{6}) = (\frac{2}{6})
  6. Simplify Fraction: Simplify the fraction (26)(\frac{2}{6}) to its lowest terms.26=13\frac{2}{6} = \frac{1}{3}
  7. Write as Exponent: Write the simplified fraction as the exponent of 88. \newline81/38^{1/3}
  8. Final Expression: Recognize that 81/38^{1/3} is the final expression for 8m8^m, which means m=13m = \frac{1}{3}.

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