buligadenisa1 buligadenisa1

25-02-2021
Mathematics

contestada

I count on in equal steps.
My first number is -9, my fifth number is 7.
-9
2
7
T
What is my third number?

Respuesta :

Аноним Аноним

25-02-2021

You can solve it by A. P

A5=7,A1=-9

A5=A1+4D

D=4

A3=A1+2D

=8-9=-1

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