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Find the numerical answer to the summation given below.

sum_(n=6)^(98)(6n+4)
Answer:

Find the numerical answer to the summation given below.\newlinen=698(6n+4) \sum_{n=6}^{98}(6 n+4) \newlineAnswer:

Full solution

Q. Find the numerical answer to the summation given below.\newlinen=698(6n+4) \sum_{n=6}^{98}(6 n+4) \newlineAnswer:
  1. Arithmetic Series Sum Formula: We need to find the sum of the arithmetic series from n=6n=6 to n=98n=98 for the expression (6n+4)(6n+4). The general formula for the sum of an arithmetic series is S=n2×(a1+an)S = \frac{n}{2} \times (a_1 + a_n), where nn is the number of terms, a1a_1 is the first term, and ana_n is the last term.
  2. Find First Term a1a_1: First, we need to find the first term a1a_1 by substituting n=6n=6 into the expression (6n+4)(6n+4). This gives us a1=6×6+4=36+4=40a_1 = 6\times6 + 4 = 36 + 4 = 40.
  3. Find Last Term ana_n: Next, we find the last term ana_n by substituting n=98n=98 into the expression (6n+4)(6n+4). This gives us an=6×98+4=588+4=592a_n = 6\times98 + 4 = 588 + 4 = 592.
  4. Determine Number of Terms: Now, we need to determine the number of terms nn in the series. Since the series starts at n=6n=6 and ends at n=98n=98, and it's an arithmetic series with a common difference of 66, we can use the formula for the nnth term of an arithmetic series: an=a1+(n1)da_n = a_1 + (n-1)d, where dd is the common difference. Rearranging the formula to solve for nn gives us n=((ana1)/d)+1n = ((a_n - a_1)/d) + 1. Substituting the values we have, n=((59240)/6)+1=(552/6)+1=92+1=93n = ((592 - 40)/6) + 1 = (552/6) + 1 = 92 + 1 = 93.
  5. Calculate Sum: Now we can use the sum formula for an arithmetic series: S=n2×(a1+an)S = \frac{n}{2} \times (a_1 + a_n). Substituting the values we have, S=932×(40+592)=46.5×632S = \frac{93}{2} \times (40 + 592) = 46.5 \times 632.
  6. Calculate Sum: Now we can use the sum formula for an arithmetic series: S=n2(a1+an)S = \frac{n}{2} * (a_1 + a_n). Substituting the values we have, S=932(40+592)=46.5632S = \frac{93}{2} * (40 + 592) = 46.5 * 632.Calculating the sum gives us S=46.5632=29388S = 46.5 * 632 = 29388.

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