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anzhelika [568]
3 years ago
13

What is the sum of 1+2+.....+50?​

Mathematics
1 answer:
Natasha_Volkova [10]3 years ago
7 0

Answer:

<u>sum</u><u> </u><u>is</u><u> </u><u>1</u><u>2</u><u>7</u><u>5</u>

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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