Question

Sigma Notation Question!!!!

Answer 1

Question 5b please!!

Answer 2

What's the easy way of doing it?

Answer 3

I think the answer is three?

Answer 4

yep

Answer 5

Yaay

Answer 6

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