3 years ago

HELLLLLLLLLLLLLPPPPPPPPPP

Mathematics

2 answers:

Liula [17]3 years ago

6 0

Answer:

Step-by-step explanation:

mark me brainliest pl

lawyer [7]3 years ago

3 0

The first option. 100% correct.

$a_n = 3\cdot a_{n-1}\\\\a_1 = 7\\\\a_2 = 3 a_{2-1} =3a_1 = 3(7) =21\\\\a_3 = 3 a_{3-1} =3a_2 = 3(21) = 63 \\\\a_4 = 3 a_{4-1} = 3 a_3 = 3 (63)=189\\\\7,21,63,189,......$

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