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# S2 Cumulative p d watch

1. can someone please explain how i would do the general type of 3e) ive been stuck for ages thanks in advance,
can someone please explain how i would do the general type of 3e) ive been stuck for ages thanks in advance,
Have you tried plugging in 3 to your answer for Q3. c) ?
3. (Original post by Topmanfaz)
Have you tried plugging in 3 to your answer for Q3. c) ?
yeah i got 1.
yeah i got 1.
Oh sorry, my mistake. F(t)=0 for t<3. So to calculate F(4), compute F(4) - F(3), which should leave you with the area under the F curve between 3 and 4 (which is what you need).
5. (Original post by Topmanfaz)
Oh sorry, my mistake. F(t)=0 for t<3. So to calculate F(4), compute F(4) - F(3), which should leave you with the area under the F curve between 3 and 4 (which is what you need).
what about the next question what do you do when you have to things you need to integrate and work out?
6. Which one do i pick if there is more than 1 like q 4

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