The value of b for which the function f(x)= x + cosx + b is strictly
decreasing over R is:
a) b < 1 b) No value of b exists
c) b ≤ 1 d) b ≥ 1
decreasing over R is:
a) b < 1 b) No value of b exists
c) b ≤ 1 d) b ≥ 1
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Answers & Comments
Option b} is correct.
f'(x) = 1 − sinx
⇒ f'(x) > 0 ⍱x ∈ R
⇒ no value of b exists.
:)
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Option : (b)
f'(x) = 1 − sinx
⇒ f'(x) > 0 ⍱x ∈ R
⇒ no value of b exists