Example 2. This pattern grows one term
at a time, beginning with x12, where each
new terms adds 1 to the coefficient and
reduces the power by 1. Add 2x11 to get
x12 + 2x11. Then add 3x10
X12 + 2x11 + 3x10. The next term to add
is 4x”, which gives x12 + 2x11 + 3x10
+4x?
to get
x12, x12 + 2x11, x12 + 2x11 + 3x10 ,
x12 + 2x11 + 3x10 + 4x',
x12 + 2x11 + 3x10 + 4x + 5x8...
please explain
Answers
Step-by-step explanation:
a sequence of numbers in which each term is 2 more than the preceding term, what is the fourth term?
(1) The last term is 90.
(2) The first term is 2.
Difference = 2
From S1:
Last term is 90, but no info about first term.
Hence Insufficient.
From S2:
First term = 2
Next term = 2+2 = 4
4th term = 8
Sufficient.
B is the answer.
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ZoltanBP
Apr 26, 2019
Bunuel wrote:
In a sequence of numbers in which each term is 2 more than the preceding term, what is the fourth term?
(1) The last term is 90.
(2) The first term is 2.
DS12602.01
OG2020 NEW QUESTION
We know that these numbers form an arithmetic sequence with a difference of 2. The original question:
1) If the last term is the 4th term, then . However, if the last term is the 5th term, then . Thus, we can't get a unique value to answer the original question. Insufficient
2) We know that , so . Thus, the answer to the original question is a unique value. Sufficient
Answer: B