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# C1 Sigma sequences helpp

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1. Basically that last part I have no idea how to do, I know that sigma is the total that's it tbh. Help would be appreciated tyy
2. The summation is basically just .
So you're just solving .
3. (k=1+(k=2)+(k=3)+(k=4), put them all into each of the equations as you go along then make the whole sum equal to 43 and solve it like you would with any other equation

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4. (Original post by junayd1998)

Basically that last part I have no idea how to do, I know that sigma is the total that's it tbh. Help would be appreciated tyy
As mentioned above, and you can express each term in terms of then solve for it.

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