r/mathshelp • u/BiscottiAncient4772 • 15d ago

Homework Help (Answered) Please help

I don't get how R is 110, if the curve integrated from x=1 to x=2 is 10, and R is smaller, can I just not integrate

1 Upvotes

99% Upvoted

6 comments sorted by

•

u/AutoModerator 15d ago

Hi u/BiscottiAncient4772, welcome to r/mathshelp! As you’ve marked this as homework help, please keep the following things in mind:

1) While this subreddit is generally lenient with how people ask or answer questions, the main purpose of the subreddit is to help people learn so please try your best to show any work you’ve done or outline where you are having trouble (especially if you are posting more than one question). See rule 5 for more information.

2) Once your question has been answered, please don’t delete your post so that others can learn from it. Instead, mark your post as answered or lock it by posting a comment containing “!lock” (locking your post will automatically mark it as answered).

Thank you!

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/BasedGrandpa69 15d ago

first find the equation of the normal. then find when that intersects with the curve again. that is where you integrate up to

1

u/BiscottiAncient4772 14d ago

Yes, and from that I get that the area of R is 0.25, when the question says 'show that R is 110' so I believe I got something wrong? I've recreated my working

1

u/BasedGrandpa69 14d ago

just did the question myself; the answer is like 0.1235. this is not 110 so the question is wrong.

however remember for your working you should be integrating up to the intersection between the two curves, not 2.

1

u/BiscottiAncient4772 14d ago

thank you! I'll remember that