Question

help please!:)
Expand the series and evaluate:

Enter your answer as the example: 1+2+3+4+5=15

Answer 1

\[\sum_{k=1}^{5} [8(k+1)]\]

Answer 2

16+24+32+40+48=160

Answer 3

\[\sum_{k=1}^{5}\left[ 8\left( k+1 \right) \right]\]
=8(1+1)+8(2+1)+8(3+1)+8(4+1)+8(5+1)
=8(2+3+4+5+6)
=8*20=160

Answer 4

thanks guys!:)