Express the Following as a Single Fraction Involving Positive Exponents $$4 x ^ { - 3 } - 5 x ^ { - 7 }$$

question 31

Multiple Choice

Express the following as a single fraction involving positive exponents only. $$4 x ^ { - 3 } - 5 x ^ { - 7 }$$

• A) \(- \frac { 1 } { x ^ { 10 } }\)
• B) \(4 x ^ { 7 } - 5 x ^ { 3 }\)
• C) \(\frac { 4 x ^ { 4 } - 5 } { x ^ { 7 } }\)
• D) \(\frac { 4 x ^ { 4 } - 5 } { x ^ { 6 } }\)
• E) \(\frac { 1 } { 4 x ^ { 7 } - 5 x ^ { 3 } }\)

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