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My name is Ann [436]
3 years ago
10

Question 8 of 14

Mathematics
2 answers:
diamong [38]3 years ago
7 0

Answer:

144.

Step-by-step explanation:

Sum of n terms = (n/2)[a1 + l]    where a1 = first and l = last term.

There are ( 1 + 23) / 2 = 12 terms in this series.

So  the sum = (12/2) [ 1 + 23]

= 6 * 24

= 144.

Oxana [17]3 years ago
3 0

Answer:

276 is correct

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