How do you find the first three terms of the arithmetic series a_1=17a1=17, a_n=197an=197, and S_n=2247Sn=2247?
2 Answers
First three terms are
Explanation:
And number of terms is
Mid term is
Sum
First three terms are
Explanation:
An arithmetic sequence is the one in which the difference of the successive terms is the same
For example,
Now lets solve the problem. For that we use the formula
color(green)(S_n=n((a_1+a_n)/2)
Where,
Now we know that the
To find the common difference, we use
color(green)(a_n=a_1+(n-1)d
Now we have come to an end to the answer. We add
color(purple)(17,26,35....
Hope this helps!!! ☺