14. 14. If f(x)= sec^2x, thenf'(x)=

Question

14. 14. If f(x)= sec^2x, thenf'(x)=

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Minh Khuê 2 months 2021-07-31T11:23:34+00:00 1 Answers 1 views 0

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    2021-07-31T11:24:54+00:00

    Answer:

    1 (2) f(x) = 1 (3) 1< f(x) < 2 (4) f(x) greater than or equal to 2

    Step-by-step explanation:

    We know AM ≥ GM

    (cos2x+sec2x )/2 ≥ √(cos2x sec2x)

    (cos2x+sec2x ) ≥ 2√(cos2x (1/cos2x)

    f(x) ≥ 2

    Hence option (4) is the answer.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )