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Question
Fill in the blank:
If f(x) = `7/"x" - 3`, x ∈ R x ≠ 0 then f ''(x) is ______
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Solution
If f(x) = `7/"x" - 3`, x ∈ R x ≠ 0 then f ''(x) is 14x-3.
Explanation:
f(x) = `7/"x" - 3`
∴ f '(x) = `(-7)/"x"^2`
∴ f ''(x) = `14/"x"^3`
`= 14"x"^-3`
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