Question

Write 3 + 6 + 9 +...+ 60 in sigma notation.

Answer 1

Hint:
the summation is in the form \(\rm \large 3n\) where \(\rm n\) starts at 1 and finishes at 20.

Answer 2

so how would i shorten that

Answer 3

Depends on you.

Answer 4

ok...?

Answer 5

Do you know what Sigma notation is?

Answer 6

i do not

Answer 7

Okay, search for sigma notation on Google and I am sure you'd understand 'em.

Answer 8

Find n th term first...u See its an Ap..Use an=a+(n-1)d

Answer 9

3 + (n-1)3 = 3n = an