Q. Find the sum of the infinite geometric series.−3−56−2512−12524+Write your answer as an integer or a fraction in simplest form.______
Identify terms and ratio: Identify the first term a and the common ratio r of the geometric series.The first term a is −3.The common ratio r can be found by dividing the second term by the first term: r=(−6/5)/(−3)=2/5.
Check convergence: Determine if the series is convergent.A geometric series converges if the absolute value of the common ratio ∣r∣ is less than 1.In this case, ∣52∣=0.4, which is less than 1, so the series is convergent.
Use sum formula: Use the formula for the sum of an infinite geometric series.The sum S of an infinite geometric series is given by S=1−ra, where a is the first term and r is the common ratio.
Calculate sum: Calculate the sum using the values of a and r.S=1−(52)−3S=55−52−3S=53−3S=(−3)⋅(35)S=−5
More problems from Find the value of an infinite geometric series