claurenray13 claurenray13

16-02-2021
Mathematics

contestada

In an Arithmetic progression, if d= -4, n=7, an=4, then find a.

Respuesta :

Hrishii Hrishii

16-02-2021

Answer:

a = 28

Step-by-step explanation:

[tex] a_n = a + (n-1) d[/tex]

[tex] 4 = a + (7-1) (-4)[/tex]

[tex] 4 = a + 6 (-4)[/tex]

[tex] 4 = a - 24[/tex]

[tex] 4 +24= a [/tex]

[tex] a = 28[/tex]

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