PreCalcPlease check answer
posted by Sandra .
1.Write 4+6+8+10 in sigma notation:
I came up with sigma in the middle
3 on top
j=0 on the bottom
2n+4 to the right of the signma sign
2. Find the 10th term of the sequence
1/5,1/20,1/80 this was a geometric sequence so I said a(subscript10) = 1/5*1/4^(101)
=1/5*(1/4)^9 = 1/5*1/2621444
= 1/1310702
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