If f(1) = 160 and f(n + 1) = –2f(n), what is f(4)?
1 answer:
Answer with Step-by-step explanation:
f(1) = 160 and f(n + 1) = –2f(n)
⇒ f(2)= -2×f(1)
= -2×160
= -320
⇒ f(3)= -2×f(2)
= -2×(-320)
= 640
⇒ f(4)= -2×f(3)
= -2×640
= -1280
Hence, Value of f(4) is:
- 1280
You might be interested in
10 : 90; 10÷10= 1; 90÷10= 9; 1:9 or 1/9
Hope this helps
Answer:
it's the 2nd answer.....
10% of 1800 is 180. If she payed 180 ten times it would be 1800 dollars. The computer is 180 dollars off. 1800-180= 1620. She pays $1620
Take 180 subtract 47 and 43. You get 90. So it would be C.
