Question

how many terms of the geometric sequence give a sum of 1022 if a5 = 32, q = 0.5? do the math

249

likes
1243 views

Answer to a math question how many terms of the geometric sequence give a sum of 1022 if a5 = 32, q = 0.5? do the math

Expert avatar
Adonis
4.4
104 Answers
Abychom našli počet členů geometrické posloupnosti, které dávají součet 1022, musíme použít vzorec pro součet geometrické řady: Sn = a * (1 - q^n) / (1 - q) Vzhledem k tomu, že a5 (pátý člen) je 32 a q (společný poměr) je 0,5, můžeme tyto hodnoty vložit do vzorce: 1022 = 32 * (1–0,5^n) / (1–0,5) Zjednodušení rovnice: 1022 = 32 * (1 - 0,5^n) / 0,5 Vynásobením obou stran rovnice 0,5 odstraníte jmenovatele: 1022 * 0,5 = 32 * (1 – 0,5^n) 511 = 32 - 16^n Přeuspořádání rovnice: 16^n = 32 - 511 16^n = -479 Protože 16 umocněné na žádnou mocninu nemůže být záporné, neexistuje žádná celočíselná hodnota n, která by vyhovovala této rovnici. Proto neexistují žádné členy geometrické posloupnosti, které dávají součet 1022 s danými hodnotami a5 = 32 a q = 0,5.

Frequently asked questions (FAQs)
Math question: In a triangle ABC, if angle A is 60 degrees, side a is 5 units, and side b is 8 units, what is the measure of angle B?
+
Math question: Find the fourth derivative of f(x) = sin(3x) - e^x.
+
Write a math question: What is the amplitude, period, and range of the cosine function f(x) = cos x?
+
New questions in Mathematics
5 squirrels were found to have an average weight of 9.3 ounces with a sample standard deviation is 1.1. Find the 95% confidence interval of the true mean weight
Since one of the three integers whose product is (-60) is (+4), write the values that two integers can take.
(x^2+3x)/(x^2-9)=
Jose bought 3/4 of oil and his sister bought 6/8, which of the two bought more oil?
What payment 7 months from now would be equivalent in value to a $3,300 payment due 23 months from now? The value of money is 2.7% simple interest. Round your answer to 2 decimal places. Show all work and how you arrive at the answer..
X^2 = 25
A bird randomly chooses to land on 1 of 12 perches available in its aviary. Determine the Probability of it landing on a perch numbered 8 and then on a perch marked with a prime number; take into account that he never lands on the same perch in the sequence.
2x-4y=-6; -4y+4y=-8
Sean must chose a 6- digit PIN number for his online banking account.Each digit can be chosen from 0 to 9. How many different possible PIN numbers can sean chose.
is the x element (180,270), if tanx-3cotx=2, sinx ?
Substitute a=2 and b=-3 and c=-4 to evaluate 2ac/(-2b^2-a)
. What will be the osmotic pressure of a solution that was prepared at 91°F by dissolving 534 grams of aluminum hydroxide in enough water to generate 2.784 ml of solution.
How to do 15 x 3304
Three machines called A, B and C, produce 43%, 26% and 31% of the total production of a company, respectively. Furthermore, it has been detected that 8%, 2% and 1.6% of the product manufactured by these machines is defective. a) What is the probability that a product is not defective? b) A product is selected at random and found to be defective, what is the probability that it was manufactured on machine B?
nI Exercises 65-68, the latitudes of a pair of cities are given. Assume that one city si directly south of the other and that the earth is a perfect sphere of radius 4000 miles. Use the arc length formula in terms of degrees to find the distance between the two cities. 65. The North Pole: latitude 90° north Springfield, Illinois: latitude 40° north
To find the increased amount on a standard term deposit with the following conditions: starting amount: BGN 13000, type of deposit: annual, annual compound interest rate: 1.4%, after 4 years;
Read the “Local Communities as Stakeholders: Does Amazon Really Need Tax Breaks?” example on p. 83 in Ch. 3 of Management: A Practical Introduction. In your response, discuss whether you feel that tax breaks for big companies benefit local communities. Describe ways to attract business to a region without having a negative impact on the larger community.
Define excel and why we use it?
Solve the system of equations by the addition method. 0.01x-0.08y=-0.1 0.2x+0.6y=0.2
The car with an irresponsible driver starts to brake when it goes through a red light. When passing the traffic light, he does so at a speed of 115 kph in the right lane. Further ahead, 70 meters from the traffic light, a child is crossing the street and falls. If the effect of the car's brakes is equivalent to a deceleration of magnitude 5.7m/s². Is the child hit by the car or not? How far from the traffic light does the car stop?