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Math

Answered

find the sum of the first 25 terms of the arithmetic sequence 17, 22, 27, 32, 37

Sagot :

JSLAZARITO30IN JSLAZARITO30IN

Answer:

1925

Step-by-step explanation:

a1 = 17 ; n = 25 ; d = 5

Sn = n/2 [ 2a1 + (n–1)d ]

Sn = 25/2 [ 2(17) + (25–1)5 ]

Sn = 12.5 [ 34 + (24)5 ]

Sn = 12.5 [ 34 + 120 ]

Sn = 12.5 [ 154 ]

Sn = 1925

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