Let $f ( x ) = 6 x ^ { 5 } - 90 \ln x$

question 7

Multiple Choice

Let $f ( x ) = 6 x ^ { 5 } - 90 \ln x$ ,for x > 0.Find the minimum value of f for x > 0.

• A)0
• B) \(3 \left( 3 ^ { 5 } - 15 \ln 3 \right)\)
• C)18(1 - ln 3)
• D) \(6 \left( 3 ^ { 5 } - 15 \ln 3 \right)\)

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