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Find the numerical answer to the summation given below.

sum_(n=0)^(69)(2n+9)
Answer:

Find the numerical answer to the summation given below.\newlinen=069(2n+9) \sum_{n=0}^{69}(2 n+9) \newlineAnswer:

Full solution

Q. Find the numerical answer to the summation given below.\newlinen=069(2n+9) \sum_{n=0}^{69}(2 n+9) \newlineAnswer:
  1. Find First Term: We need to find the sum of the arithmetic series where the nnth term is given by the formula (2n+9)(2n+9). The series starts at n=0n=0 and ends at n=69n=69.
  2. Find Last Term: First, let's find the first term of the series when n=0n=0. Plugging in n=0n=0 into the formula (2n+9)(2n+9) gives us the first term a1=2(0)+9=9a_1 = 2(0) + 9 = 9.
  3. Calculate Sum Formula: Next, let's find the last term of the series when n=69n=69. Plugging in n=69n=69 into the formula (2n+9)(2n+9) gives us the last term a70=2(69)+9=138+9=147a_{70} = 2(69) + 9 = 138 + 9 = 147.
  4. Plug in Values: The sum of an arithmetic series can be found using the formula Sn=n2(a1+an)S_n = \frac{n}{2} * (a_1 + a_n), where nn is the number of terms, a1a_1 is the first term, and ana_n is the last term. Since we start at n=0n=0 and go to n=69n=69, there are 7070 terms in total.
  5. Calculate Sum: Now we can plug the values into the sum formula: S70=702×(9+147)=35×156S_{70} = \frac{70}{2} \times (9 + 147) = 35 \times 156.
  6. Calculate Sum: Now we can plug the values into the sum formula: S70=702×(9+147)=35×156S_{70} = \frac{70}{2} \times (9 + 147) = 35 \times 156. Calculating the sum gives us S70=35×156=5460S_{70} = 35 \times 156 = 5460.

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