3 years ago

What is the sum of the first 20 terms of the series below?

Mathematics

2 answers:

Evgesh-ka [11]3 years ago

7 0

the sum of the first 20 terms of the series below is C.

Natalija [7]3 years ago

6 0

Answer:

Step-by-step explanation:

Now to find the sum of first 20 terms, substitute n=20,a=−1 and d=4 in S n = 2n [2a+ (n−1)d] as follows: S 20 = 220 [(2×−1)+(20−1)4]=10[−2+(19×4)]=10(−2+76)=10×74=740 Hence, the sum of first 20 terms is 740.

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2 years ago

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Karo-lina-s [1.5K]

Answer:

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4 years ago

Brianna buys a doll for 11.58 and some lotion for 3.14 she pays with a 20 dollar bill how much change should she get to the near

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3 years ago

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3 years ago

ben bought 2 shirts for $16 each,3 pairs of socks for 2.50 a pair, and a pair of jeans for 37.75. if the sales tax is 6.5%,how m

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