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Find the 21st term in the following arithmetic sequence -1, -3, -5, -7,
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Nov 25, 2023
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Find the 21st term in the following arithmetic sequence
-1, -3, -5, -7,
Mathematics
high-school
Rajesh N
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Rajesh N
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First of all we can find what it’s going down in as it’s taking away 2 each time so we know it’s -2n then we can do 2 add -1 which is 1 and know that the sequence is -2n + 1 then we put n = 21 and do -2 x 21 + 1 which gives you the answer of:
-41
Kwane
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Nov 25, 2023
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Kwane
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Answer: -41
Work Shown:
Alhazen
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Dec 1, 2023
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Alhazen
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