Question

Write in sigma notation:
a1 = 3, an=39, d=4

an=a1+(n-1)d
an=4n-1

Answer 1

\[\sum_{n=1}^{10} 4n-1\]

Answer 2

Is this correct? a\[a_{1} = 3, a_{n} = 39, d=4\]

Answer 3

Is the sigma notation written above correct?

Answer 4

yes