Q. Find the numerical answer to the summation given below.n=6∑98(6n+4)Answer:
Arithmetic Series Sum Formula: We need to find the sum of the arithmetic series from n=6 to n=98 for the expression (6n+4). The general formula for the sum of an arithmetic series is S=2n×(a1+an), where n is the number of terms, a1 is the first term, and an is the last term.
Find First Term a1: First, we need to find the first term a1 by substituting n=6 into the expression (6n+4). This gives us a1=6×6+4=36+4=40.
Find Last Term an: Next, we find the last term an by substituting n=98 into the expression (6n+4). This gives us an=6×98+4=588+4=592.
Determine Number of Terms: Now, we need to determine the number of terms n in the series. Since the series starts at n=6 and ends at n=98, and it's an arithmetic series with a common difference of 6, we can use the formula for the nth term of an arithmetic series: an=a1+(n−1)d, where d is the common difference. Rearranging the formula to solve for n gives us n=((an−a1)/d)+1. Substituting the values we have, n=((592−40)/6)+1=(552/6)+1=92+1=93.
Calculate Sum: Now we can use the sum formula for an arithmetic series: S=2n×(a1+an). Substituting the values we have, S=293×(40+592)=46.5×632.
Calculate Sum: Now we can use the sum formula for an arithmetic series: S=2n∗(a1+an). Substituting the values we have, S=293∗(40+592)=46.5∗632.Calculating the sum gives us S=46.5∗632=29388.
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