Question

Find the sum of 5+10+15......+100​

Answer 1

Step-by-step explanation:

1050

(calculated)

Hope it helps uhh ❤️

Answer 2

a = 5

d = 5

last term = 100

=> 5 + (n - 1)5 = 100

=> 5n - 5 = 95

=> n = 20

$\\sum = \frac{20}{2} (5 + 100) \\ \\ = 10 \times 105 \\ \\ = 1050$