In an arithmetic progression that consists of 60 limits overall
- The sum of first 20 limits is 200
- The sum of the last limits is 1000
What's the sum of all the 60 limits?
The rule you should use is
Sn=n/2(2a1+(n-1)d)
In an arithmetic progression that consists of 60 limits overall
- The sum of first 20 limits is 200
- The sum of the last limits is 1000
What's the sum of all the 60 limits?
The rule you should use is
Sn=n/2(2a1+(n-1)d)
by "limits", do you mean the number of terms of the arithmetic series?In an arithmetic progression that consists of 60 limits overall
I understand the first statement to be $a_1 + a_2 + ... + a_{20} = 200$- The sum of first 20 limits is 200
- The sum of the last limits is 1000
does the second statement mean $a_{21} + a_{22} + a_{23} + ... + a_{60} = 1000$ ?
shouldn't $S_{60} = 1200$What's the sum of all the 60 limits?
... please provide a correction if there is a misunderstanding.