b) yes; -0.2
c) no
d) yes; 2
更新1:
i just want to know if it is b) yes; -0.2
s the following sequence arithmetic? If so, identify the common difference. 2.9, 2.7, 2.5, 2.3, . . .?
回答 (3)
2016-06-30 11:54 am
2.9, 2.7, 2.5, 2.3, . . .
a₂ - a₁ = 2.7 - 2.9 = -0.2
a₃ - a₂ = 2.5 - 2.7 = -0.2
a₄ - a₃ = 2.3 - 2.5 = -0.2
Hence, this is an arithmetic sequence with common difference = -0.2
...... The answer is : b) yes, -0.2
a₂ - a₁ = 2.7 - 2.9 = -0.2
a₃ - a₂ = 2.5 - 2.7 = -0.2
a₄ - a₃ = 2.3 - 2.5 = -0.2
Hence, this is an arithmetic sequence with common difference = -0.2
...... The answer is : b) yes, -0.2
2016-06-30 11:47 am
If you add -0.2 to each term do you get the next term?
Yes.
That makes -0.2 the common difference. And since there is a common difference, then yes it's an arithmetic sequence. So you are correct.
Yes.
That makes -0.2 the common difference. And since there is a common difference, then yes it's an arithmetic sequence. So you are correct.
2016-06-30 12:43 pm
The terms keep decreasing by 0.2
Common difference is -0.2
Common difference is -0.2
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