alleryStart learning →Which integral always equals the integral of f(x) from 0 to a?
AIntegral of f(x - a) from 0 to a
BIntegral of f(a - x) from 0 to a
CIntegral of f(a - x) from a to 0
DIntegral of f(-x) from 0 to a
Answer & Solution
Correct answer: B. Integral of f(a - x) from 0 to a
Substituting x = a - t maps the limits 0 to a back onto themselves, so the two integrals are equal.
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