3 years ago

What is the sum of 1+2+.....+50?

1 answer:

7 0

Answer:

sum is 1275

Step-by-step explanation:

$sum = \frac{n}{2} [2a + (n - 1)d] \\ \\ sum = \frac{50}{2} [(2 \times 1) + (50 - 1) \times 1] \\ \\ sum = 25(51) \\ sum = 1275$

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What is the sum of 1+2+.....+50?​