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𝘶-substitution: indefinite integrals

AP.CALC: FUN‑6 (EU), FUN‑6.D (LO), FUN‑6.D.1 (EK)

integral, 3, x, squared, left parenthesis, x, cubed, plus, 1, right parenthesis, start superscript, 6, end superscript, d, x, equals

(Choice A)
start fraction, x, start superscript, 7, end superscript, divided by, 7, end fraction, plus, C
(Choice B)
start fraction, x, cubed, left parenthesis, start fraction, 1, divided by, 4, end fraction, x, start superscript, 4, end superscript, plus, x, right parenthesis, start superscript, 7, end superscript, divided by, 7, end fraction, plus, C
(Choice C)
start fraction, x, cubed, left parenthesis, x, cubed, plus, 1, right parenthesis, start superscript, 7, end superscript, divided by, 7, end fraction, plus, C
(Choice D)
start fraction, left parenthesis, x, cubed, plus, 1, right parenthesis, start superscript, 7, end superscript, divided by, 7, end fraction, plus, C

Stuck?

AP®︎ Calculus BC (2017 edition)