juweria2005 juweria2005

29-01-2021
Mathematics

contestada

The 2th term of The A.P is 7 and 9th term is 28, Find The comon difference and The first term.
help me please

Respuesta :

ironman2000 ironman2000

29-01-2021

Answer:

difference = 3, first term = 4

Step-by-step explanation:

given, a2 = 7

a9 = 28

wkt, a2 = a + d = 7

a9 = a + 8d = 28

- 7d = - 21

therefore d = 3

and wkt, d = a2 - a

a = 7 - 3 = 4

HOPE THIS HELPS

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