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In-s [12.5K]
3 years ago
13

Plz plz someone help me out with this

Mathematics
1 answer:
kvasek [131]3 years ago
7 0

Answer:

option D

a_{1}=6561 and a_{n}=\frac{1}{3}a_{n-1}

Step-by-step explanation:

a_{3} = 729\\\\a_{4} = 243\\\\r = \frac{a_{4}}{a_{3}}\\\\r=\frac{243}{729}\\\\r=\frac{1}{3}

Recursive rule: Next term is obtained by multiplying (1/3) wiht the previous term

a_{n}=\frac{1}{3}*a_{n-1}

a_{3} = \frac{1}{3}*a_{2}\\\\\\729 = \frac{1}{3}*a_{2}\\\\\\729*3=a_{2}\\\\a_{2} = 2187\\\\\\

a_{2}=\frac{1}{3}*a_{1}\\\\\\2187=\frac{1}{3}*a_{1}\\\\\\2187*3=a_{1}\\\\a_{1}=6561

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