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Find the sum of the first 10 terms of the arithmetic sequence 5,9,13,17

Sagot :

Answer ;

Sn= 10/2 [2 (5)+(10-1)4]
*10/2 you need to divide it. So the answer was 5.

Sn= 5 [10+(9)4]
*2x5 is equal to 10.
*10-1 is equal to 9.

Sn= 5 [10+36]
*Since when it comes to math you need to follow the PEMDAS means Parenthesis, Exponent, Multiplication, Division, Addition, and Subtract.

Sn= 5 (46)
* multiply it.

Sn=230.


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