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Which is equal to 18940\frac{1}{89^{40}}?\newlineChoices:\newline(A) (89)40-(-89)^{40}\newline(B) 1(89)40-\frac{1}{(-89)^{-40}}\newline(C) 894089^{-40}\newline(D) 8940-89^{40}

Full solution

Q. Which is equal to 18940\frac{1}{89^{40}}?\newlineChoices:\newline(A) (89)40-(-89)^{40}\newline(B) 1(89)40-\frac{1}{(-89)^{-40}}\newline(C) 894089^{-40}\newline(D) 8940-89^{40}
  1. Understand Expression: Understand the given expression 18940\frac{1}{89^{40}}. The given expression is a fraction with 11 in the numerator and 894089^{40} in the denominator.
  2. Apply Negative Exponent Rule: Identify the equivalent expression using the negative exponent rule.\newlineThe negative exponent rule states that am=1ama^{-m} = \frac{1}{a^m}. Therefore, 18940\frac{1}{89^{40}} can be written as 894089^{-40}.
  3. Compare with Choices: Compare the equivalent expression with the given choices.\newlineThe expression 894089^{-40} matches with choice (C) 894089^{-40}.