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# C2 Sequences question(s) watch

1. 4 parts. I need help on b, c and d please.

2. (Original post by Fractite)
4 parts. I need help on b, c and d please.

Could you rotate the photo and show some working please?
3. (Original post by Mr M)
Could you rotate the photo and show some working please?
The thing is, I have no idea what to do for the parts b, c and d.

4. (Original post by Fractite)
The thing is, I have no idea what to do for the parts b, c and d.

Well, the integral in part b is the area under the graph between x = r - 1 and x = r. Any rectangle between these two x values which lies totally beneath the curve will have smaller area, right?

c and d follow fairly naturally from b. Note that the integral between 1 to N is the same as the integral from 1 to 2 + the integral from 2 to 3 + ... + the integral from N-1 to N.
5. (Original post by Fractite)
The thing is, I have no idea what to do for the parts b, c and d.
Attached Images

6. (Original post by 13 1 20 8 42)
Well, the integral in part b is the area under the graph between x = r - 1 and x = r. Any rectangle between these two x values which lies totally beneath the curve will have smaller area, right?

c and d follow fairly naturally from b. Note that the integral between 1 to N is the same as the integral from 1 to 2 + the integral from 2 to 3 + ... + the integral from N-1 to N.
(Original post by Mr M)
Thank you both!

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