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Math

Answered

find the sum of the first 25 terms of arithmetic sequence 26,23,20,17.

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Sagot :

CJA032297IN CJA032297IN

Step-by-step explanation:

T2-T1= 23 - 26 = -3

n=25. T2=23. T1 =26. d= -3.

just minus until you reach 25 term

-46 is the answer

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