(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

i am have to approximate the area under the curve using left endpoints.

2. Relevant equations

y= squr(x+2) on [1,4], n =16

3. The attempt at a solution

i have the change in x to be 3/16 using (b-a)/n i also found my xsubi to be (1+3i/16) using xsubi = xsubo + i(chang in x). then i got (3/16) E (squr(1+(3i/16)+ 2)) i am stuck on how to get the i out to then apply the formula n(n+1)/2 or n(n+1)(2n+1)/6.

Thank you ahead of time.

another question similar problem but i get stuck after i dont know how to take the i out of cos(pi(i)/100) i tried multiplying by sec but i still dont get the right answer. do i multiply by sec? to get the i out of cos(pi(i)/100)?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Using left endpts help with squr(3i/16) how to get the i out

**Physics Forums | Science Articles, Homework Help, Discussion**