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4-88.
  1. Rewrite the following integral expressions as single integrals. Homework Help ✎

Translation: three times the area under f(x) between x = 1 and x = 6 + five times the same area. Write this as a single integral.

See hint (a) and then see hint (c).

Since an integral is the area underneath or above a curve, if you take a smaller portion of that area and subtract it from a larger portion, both starting at the same point, what are you left with?