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What is the correct expression for the area A if f(x) crosses the x-axis multiple times?

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Single Answer MCQ

Q-00078121

A = ∫[a to b] f(x) dx

A = |∫[a to c] f(x) dx| + |∫[c to d] f(x) dx| + ...

A = ∫[a to b] |f(x)| dx

A = A1 + A2 + ... + An

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