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victus00 [196]
3 years ago
7

1) a, = an-1-9 a, = 25

Mathematics
2 answers:
Damm [24]3 years ago
8 0

Answer:

n=1.4

Step-by-step explanation:

given  a=25

a=an-1-9..............(1)

put a=25 in equ (1)

25=25n-1-9

25=25n-10

25n=25+10=35

n=\frac{35}{25}=1.4

n=1.4   answer

marin [14]3 years ago
3 0

Answer:

an-1-9

25n-1-9

25n-10=0

25n=0+10

25n=10

divide both sides by 25

25n/25 =10/25

n=2/5

Step-by-step explanation:

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