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lesya [120]
3 years ago
13

Nth triangular number = 2 (n + 1)

Mathematics
1 answer:
mina [271]3 years ago
7 0

Answer:

a) 2(n+1)

=2(12+1)

=2*13

=26

b) 2(n+1)

=2(50+1)

=2*51

=102

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