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MATEMATIKA
Fungsi
f(t) = 4t + 7
f(3+h) - f(3) / h = (4(3 + h) + 7) - (4(3) + 7) / h
= (4(3 + h) + 7) - (4(3) + 7) / h
= (12 + 4h + 7) - 19 / h
= 12 + 4h + 7 - 19 / h
= 4h / h
= 4
Maka f(3+h) - f(3) / h = 4. (B)