Question

What is the sum of the series below?

Answer 1

177

Answer 2

\[\sum_{i=1}^{6}\left( 9i-1 \right)=\left( 9-1 \right)+\left( 18-1 \right)+\left( 27-1 \right)\]+(36-1)+(45-1)+(54-1)
=9+18+27+36+45+54-6
=189-6
=183
\[or 9* \left( 1+2+3+4+5+6 \right)-6=9*21-6=189-6=183\]

Answer 3

like i was in a quiz and i put in the wrong answer then it told me that 177 was the answer

Answer 4

\[\sum_{i=1}^{6}\left( 9i-2 \right)=189-12=177\]