In a trapezoidal rule problem I got following question:
"Evaluate the above integral using trapezoidal rule with five points."
My confusion is here what we take for the value of $n$ is it $5$ or $4$. I'm thinking like suppose if you take $5$ points $1,2,3,4,5$ then there would be $4$ sections/intervals so that's why $n$ should be $4$. Can anyone help me in it that what would be $n$'s value and why? Please provide explanation too if possible. Thanks!
Note: $h=\frac{b-a}{n}$ where $b$ and $a$ are limits.