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andreykasss
@andreykasss
July 2022
2
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разность арифметической прогрессии равна 1,5.
найти а1, если:
а7=-4
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Answers & Comments
karmelita1953
а7=а1+6d
-4=a1+6*1,5
a1+9=-4 a1=-9-4=-13
12 votes
Thanks 21
natali3221
A7=a1+6d
a1+6·1.5=-4
a1+9=-4
a1=-13
3 votes
Thanks 9
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Answers & Comments
а7=а1+6d
-4=a1+6*1,5
a1+9=-4 a1=-9-4=-13
a1+6·1.5=-4
a1+9=-4
a1=-13