1
Question
The series of natural numbers is written as follows:
1
2 3 4
5 6 7 8 9
... ... ...
... ... ...
Find the sum of the numbers in the nth row:
The series of natural numbers is written as follows:
1
2 3 4
5 6 7 8 9
... ... ...
... ... ...
Find the sum of the numbers in the nth row:
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Solution
The correct option is C n3+(n−1)3
Go through options.
Let us consider choice (c)
for n = 1, S1=(1)3+(1−1)3= 1for n=2, S2=(2)3+(2−1)3= 9for n=3, S3=(3)3+(3−1)3= 35
Hence choice (c) is correct.
Go through options.
Let us consider choice (c)
for n = 1, S1=(1)3+(1−1)3= 1for n=2, S2=(2)3+(2−1)3= 9for n=3, S3=(3)3+(3−1)3= 35
Hence choice (c) is correct.
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