1) Compute the sum:
3+8+13+...293+298+303
2) How many terms are there in this geometric sequence?
\([3, 3 \sqrt 2, 6, \dots, 96, 96 \sqrt 2, 192]\)
3) These five real numbers form a geometric sequence with r>0:
a,b,c,d,e
If a+e=1282 and b+d=580, find the value of c.
