please help. fan & medal.

Use summation notation to write the series 2 + 4+6 +8 + … for 10 terms. In each of these images, the lower limit of the summation notation is either "n=1" or "n = 0"

Question

please help. fan & medal.

Use summation notation to write the series 2 + 4+6 +8 + … for 10 terms. In each of these images, the lower limit of the summation notation is either "n=1" or "n = 0"

anonymous · Answer

what expression can be used to define any even integer?

anonymous · Answer

$$\sum_{n=1}^{10}2n$$

anonymous · Answer

2+4+6+.....
it is an A.P.
a=2,d=4-2=2
tn =a+(n-1) d
=2+(n-1)*2
=2+2n-2
=2n
$$S10=\sum_{n=1}^{10}\left( 2n \right)$$