1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lakkis [162]
3 years ago
10

If a1=4 and an =2an-1 – 1 then find the value of a4.

Mathematics
1 answer:
musickatia [10]3 years ago
7 0
1 = 4

a2 = -2(a1) - 1
a2 = -2(4) - 1
a2 = -9

a3 = -2(a2) - 1
a3 = -2(9) - 1
a3 = -19

Can you do a4 and a5 and answer?
You might be interested in
please help 100 points!!! will give crown to best answer if f(x) = 3x^2 -2x + 4 and g (x) = 5x ^2 + 6x -8 find (f-g) (x)
Alexxandr [17]
(f-g)(x) will be 3x^2 -2x+4 -(5x^2+6×-8)
distribute the -sign, gives us
3x^2-2x+4-5x^2-6x+8,
now combine like terms and should get,
-2x^2-8x+12,
final answer,
(f-g)(x)= -2x^2-8x+1×,
hope it helped,
good luck
8 0
4 years ago
Read 2 more answers
What is the domain ??
prohojiy [21]

Answer:

[-8, 6]

Step-by-step explanation:

Domain is the x values. Look at the smallet x value, in this case -8, and the largest, in this case 6, and write them like a point using [] not (). You use [ or ] for numbers and ( or ) for infinity signs.

7 0
3 years ago
(Old furniture sold for cash Rs. 1500)
atroni [7]
What’s the question?
6 0
4 years ago
In ΔEFG, the measure of ∠G=90°, the measure of ∠E=6°, and GE = 71 feet. Find the length of EF to the nearest tenth of a foot.
djyliett [7]

Answer:68.2

Step-by-step explanation:

cos6=71/EF

cos6= 0.960170286650366

0.960170286650366= 71/EF

0.960170286650366*71=EF

EF= 68.2

3 0
3 years ago
Read 2 more answers
8x = 2y + 5 3x = y + 7 Solve the system of equations by substitution.
jasenka [17]
<span>3x = y + 7
</span><span> y =3x-7
</span>
<span>8x = 2y + 5
</span><span>8x = 2(3x-7) + 5
8x=6x-14+5
8x-6x=-9
2x=-9
x=-4.5

</span><span>8x = 2y + 5
</span>8(4.5)=2y+5
36=2y+5
2y=31
y=15.5
8 0
4 years ago
Other questions:
  • Sylvia has three gerbils. if two of her gerbils each have six babies every two months, how many babies will the gerbils have alt
    12·1 answer
  • Solve y=1/4x-1 if the domain is {-4,-2,0,2,4}.
    12·1 answer
  • A teacher has four books—A, B, C, and D—to assign to four students in any order he prefers. Set S includes all possible arrangem
    8·2 answers
  • Algebra help please?
    8·1 answer
  • How do you get the answer to this problem?<br> (2^3)(2^-7)
    10·1 answer
  • Find the value of x to the nearest tenth.
    11·1 answer
  • Trigonometry, IF answer is delivered on time WILL give BRANLIEST
    11·1 answer
  • Part A and B Please 10 points
    13·2 answers
  • Some one please help me Thx
    14·2 answers
  • A taxi driver uses the formula 3.00 +1.5m to calculate the cost of a taxi
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!