## byerskm2 3 years ago Identify the function f and the largest interval of form [0, a] on which the limit below represents a definite integral. http://i48.tinypic.com/9aslfo.jpg

1. satellite73

please tell me you tried $$f(x)=\sqrt{49-x^2}$$

2. byerskm2

Of course i did

3. satellite73

didn't work?

4. satellite73

oh damn, there is a 2 out there, isn't there

5. byerskm2

yeah and I tried it with the 2 as well

6. mahmit2012

f(x)=sq(x(a-x))

7. satellite73

i think it is $$f(x)=2\sqrt{49-x^2}$$

8. byerskm2

I tried that

9. satellite73

integral is $\sum_{i=1}^nf(x_i^*)\Delta x$

10. satellite73

then i am lost

11. satellite73

oh maybe you were supposed to put in the interval as well

12. byerskm2

Maybe if I change the order to match that so that the 2 is the last part...I orignally wrote it 2*sqrt49-x^2

13. byerskm2

wow...yeah of course it accepted that and not the 2* one...thanks quys. I hate online hw

14. satellite73

jesus

15. mahmit2012

dx=a-0/n and max of a is 7 so dx=7/n so if deltax is i/n you can find the coefficient.

16. satellite73

picky picky picky

17. byerskm2

indeed. XP