Q. Find the sum of the first 10 terms of the following series, to the nearest integer.6,12,24,…Answer:
Identify type and ratio: Identify the type of series and the common ratio.The series is geometric because each term is a multiple of the previous term. To find the common ratio, divide the second term by the first term.612=2Common Ratio: 2
Use sum formula: Use the formula for the sum of the first n terms of a geometric series.The formula for the sum of the first n terms (Sn) of a geometric series is:Sn=(1−r)a(1−rn), where a is the first term, r is the common ratio, and n is the number of terms.
Plug values into formula: Plug the values into the formula to find the sum of the first 10 terms.a=6 (the first term)r=2 (the common ratio)n=10 (the number of terms)S10=(1−2)6(1−210)
Calculate sum: Calculate the sum using the values from Step 3.S10=6(1−1024)/(1−2)S10=6(−1023)/(−1)S10=6×1023S10=6138