a) Recognize the pattern of line segments: Sequence: 7, 13... Find the common difference in the arithmetic sequence
Derive arithmetic sequence formula
Set equal to 325 and solve for n
b) Sum of arithmetic sequence formula:
![S_{n}=\frac{n}{2}[2u_{1}+(n-1)(d)]](https://www.inertialearning.com/wp-content/ql-cache/quicklatex.com-2c50a203c060e433e8508007925f836c_l3.png "Rendered by QuickLaTeX.com")
![S_{23}=\frac{23}{2}[2(7)+(23-1)(6)]](https://www.inertialearning.com/wp-content/ql-cache/quicklatex.com-c823734e6872192a925dccefe1e1d939_l3.png "Rendered by QuickLaTeX.com")
![S_{23}=\frac{23}{2}[146]](https://www.inertialearning.com/wp-content/ql-cache/quicklatex.com-43a8761d87d96bc02ff0f4c09bb3c52e_l3.png "Rendered by QuickLaTeX.com")
Share the joy with your friends:
Share on facebook
Facebook
Share on twitter
Twitter
Share on reddit
Reddit
Share on whatsapp
WhatsApp
Share on email
Email