pazzo13 pazzo13

05-07-2019
Mathematics

contestada

the sum of all the 2 digit numbers is .. plz give explanation too

Respuesta :

dawidpacia19 dawidpacia19

05-07-2019

Answer:

4905

Step-by-step explanation:

[tex]Sn= \frac{(a_1+a_n)}{2}*n\\\\Sn = \frac{10+99}{2}*90 = 4905[/tex]

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