- #1
poiboi86
- 1
- 0
Hi.
I'm solving the definite integral 4π∫{0,3/2}(x^3)dx
For some reason I get a different answer solving by hand and using my TI-89 than I do when I use an online calculator or my TI-36X Pro. I have to use the TI-36X Pro to take my Engineering FE exam in 2 & 1/2 weeks and need to know why I'm getting these different answers.
Does anyone see what I'm missing?
Solving by hand I get πx^4|{0,3/2} = π(3/2)^4 - 0 = 81π/16
This is also what the solution shows, and what my TI-89 calculator gives me as an answer.
But for some reason when I type that same integral into my TI-36X Pro calculator, or an online integral calculator like: <http://www.solvemymath.com/online_math_calculator/calculus/definite_integral/index.php>
I get the answer 15.904 which is 5π/16.
Thank you very much!
Isaac
Homework Statement
I'm solving the definite integral 4π∫{0,3/2}(x^3)dx
For some reason I get a different answer solving by hand and using my TI-89 than I do when I use an online calculator or my TI-36X Pro. I have to use the TI-36X Pro to take my Engineering FE exam in 2 & 1/2 weeks and need to know why I'm getting these different answers.
Does anyone see what I'm missing?
The Attempt at a Solution
Solving by hand I get πx^4|{0,3/2} = π(3/2)^4 - 0 = 81π/16
This is also what the solution shows, and what my TI-89 calculator gives me as an answer.
But for some reason when I type that same integral into my TI-36X Pro calculator, or an online integral calculator like: <http://www.solvemymath.com/online_math_calculator/calculus/definite_integral/index.php>
I get the answer 15.904 which is 5π/16.
Thank you very much!
Isaac
Last edited by a moderator: