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

Relax

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

For which segment is B a midpoint?

Please help me.....................

Fig. 14.36 3 A concrete floor is 4 m long and 3 m wide. Calculate: a the area of the floor, b the cost of making the floor if concrete is N2 400 per m². What is

Verify that a÷(b+c)=(a÷b)+(a ÷c), a=10 , b=5 , 6=2

True of False - A person with a low BMR (who burns fewer calories while at rest or sleeping) will tend to gain more pounds of body fat over time, compared with

What is the initial value and what does it represent?

A. weeks B. laughs C. days D. stops

The US Federal System is the voting method for passing a bill into law. It involves 100 members of the Senate, 435 members of the House of Representatives, the

the national banking system under Alexander Hamilton from which party? a.federalist b.Anti-Federalists c.Republicans

what is thank you in spanish?