## aceace Group Title Sigma Notation Question!!!! 2 years ago 2 years ago

1. aceace

2. aceace

What's the easy way of doing it?

3. aceace

I think the answer is three?

4. Algebraic!

yep

5. aceace

Yaay

6. Algebraic!

there's problem a general expression for the sum, don't know what exactly it is, but it's easy enough to see... $(\sqrt[4]{1+1} -\sqrt[4]{1}) +(\sqrt[4]{1+2} -\sqrt[4]{2}) + (\sqrt[4]{1+3} -\sqrt[4]{3})...$ 1st and 4th terms cancel, 3rd and 6th terms cancel... etc. all terms cancel but the second and last