Continuity and DifferentiabilityMedium
Question
If f(x) = sin 
, 1 < x < 2 and [x] denotes the greatest integer less than or equal to x, then f′ 
is equal to -
, 1 < x < 2 and [x] denotes the greatest integer less than or equal to x, then f′ is equal to -Options
A.5
B.-5
C.0
D.None of these
Solution
f(x) = sin 
1 < x < 2; [x] = 1
f(x) = sin
f′(x) = cos 
× -5x4
f′
= 1 × - 5 × 
1 < x < 2; [x] = 1f(x) = sin
f′(x) = cos × -5x4f′
= 1 × - 5 × Create a free account to view solution
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