I am reading about integrals:
The right hand side of the last equation reads:
$$ ... x^3 \cdot 1 \cdot x \cdot \sin x... $$
Is that $1$ supposed to be a $+$ instead?
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5You're right, it must be $x^3+x\sin x$. – Javi Dec 28 '18 at 23:46
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4Yes.$\phantom{}$ – anomaly Dec 28 '18 at 23:46
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4Yes, Please let the publisher know. – Ethan Bolker Dec 28 '18 at 23:52
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1It would be helpful to mention which textbook this is, so that if anyone searches for typos of that textbook then this post can show up. – Mar 12 '19 at 04:44
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As the commenters confirmed, that is indeed a typo, and letting the publisher know would be a good idea, so that future students aren't confused as well.
As a quick sanity check, $x^3+x\sin x$ does make much more sense in that context than $x^4\sin x$ would.
Robert Howard
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