Application of DerivativeHard
Question
Let f(x) = 
the set of values of b for which f(x) has greatest value at x = 1 is given by :
the set of values of b for which f(x) has greatest value at x = 1 is given by :Options
A.1 ≤ b ≤ 2
B.b = {1, 2}
C.b ∈ (- ∞, - 1)
D.
Solution
f(1-) ≤ f(1) and f(1+) ≤ f(1)
- 2 + log2 (b2 - 2) ≤ 5
0 < b2 - 2 ≤ 128 2 < b2 ≤ 130
- 2 + log2 (b2 - 2) ≤ 5
0 < b2 - 2 ≤ 128 2 < b2 ≤ 130
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