Datboiriley69 Datboiriley69

22-06-2018
Mathematics

contestada

What is the sum of the geometric sequence four, 16, 64,... If there are eight terms

A)21,845
B) 43,690
C)65,535
D)87,380

Respuesta :

LammettHash LammettHash

23-06-2018

[tex]S=4^1+4^2+4^3+\cdots+4^8[/tex]
[tex]4S=4^2+4^3+4^4+\cdots+4^9[/tex]
[tex]\implies4S-S=3S=4^9-4^1[/tex]
[tex]\implies S=\dfrac{4^9-4}3=87,380[/tex]

Answer Link

Otras preguntas

Arlina got a 5% raise while the rate of inflation was 6%. arlina's standard of living:

Thermal energy is the _____ and internal energy is the _____ Answers. Average kinetic energy of the particles in an object. Total energy of particles in an obje

What is the area of this figure?? Plzzz help hurry

Explain how goal setting affects a person's motivation...

Help me with this Please

Although there is no formal provision in the constitution establishing their use, U.S presidents can nevertheless issue which of the selections A. Formal apolog

Can someone pls help me out

When employees have multiple concurrent connections , what might be happening to the vpn syatem?

What is the conflict in the passage?Neto questions whether he can keep playing football.Neto questions whether Jesse is a true friend.Neto questions whether the

can someone help me plz. The value of x is