Question

Identify the 16th term of a geometric sequence where a1 = 4 and a8 = −8,748.

Answer 1

in geometric sequence you multiply the previous number with a constant r right? so a1=4 a2=4*r a3=4*r^2 a4=4*r^3 ... a8=4*r^7 ... a16=4*r^15

Answer 2

-8,748=4*r^7 find r and find 4*r^15

Answer 3

ok

Answer 4

−172,186,884

−57,395,628

57,395,628

172,186,884

Answer 5

it will be negative right?

Answer 6

i need a calculator sec :D

Answer 7

yes negative for sure

Answer 8

which one?

Answer 9

r is -3 right? find 4*(-3)^15 which is -57 million something

Answer 10

A bacteria culture begins with 15 bacteria which double in amount at the end of every hour. How many bacteria exist in the culture at the end of the 12th hour?

Answer 11

at first we got 15 lets call it b1, b1=15 b2=15 times 2 right? so b2=15*2 b3=15*2^2 so b12=15*2^11 right?

Answer 12

yes

Answer 13

whats the final answer?

Answer 14

@AllTehMaffs

Answer 15

@AllTehMaffs

Answer 16

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