Find the 50th term of the following series:
1 + 3 + 7 + 13 +21 + .....
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Step-by-step explanation:
S = 1 + 3 + 7 + 13 +21 + .......
S =. 1 + 3 + 7 + 13 +21 + .....
Subtracting we get,
0 = 1+2+4+6+8+......upto n terms
The common difference is in AP
You can find out in this way or
1^2-0=1
2^2-1=3
3^2-2=7
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Therefore
50 th term = 50^2-49 = 2451
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