Question

What is the value of this summation? 4
Σ (2i+6i^2)
I=1
I

Answer 1

A: 180
B: 200
C: 220
D: 240

Answer 2

\[\sum_{i=1}^{4}\left( 2i+6i ^{2} \right)=2\left( 1+2+3+4 \right)+6\left( 1^{2}+2^{2}+3^{2}+4^{2} \right)\]
\[=2\left( 10 \right)+6\left( 1+4+9+16 \right)=20+6*30=200\]

Answer 3

Thank you so much!! :)

Answer 4

yw