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y' = (1/2).x/√(x-2) + √(x-2) ; interval naik saat y' > 0
y' = (3x-4)/√(x-2)
x-2 > 0
x > 2..........maka 3x-4 > 0
x > 4/3
maka: x > 2.........opsi E
2. f(x) = tan x sin x
f(x) = sin² x/cos x
f(x) = (1-cos²x)/cos x
f(x) = 1/cos x - cos x
f'(x) = sin x/cos² x + sin x
f'(x) = tan x.sec x + sin x