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Find the sum of the first 15th terms of the arithmetic sequence 10,15,20,25.i need solution pls.kasi ang answer po is 675 ​

Sagot :

Answer:

10,15,20,25,30,35,40,45,50,55,60,65,70,75,80

Step-by-step explanation:

10+15+20+25+30+35+40+45+50+55+60+65+70+75+80=675