Scaled reciprocal (ay +/- b/y = k): rescale, then square
This type of question, asked 7 times: 14 Jul 2023 S1, 19 Jul 2023 S2, 20 Jul 2023 S2, 20 Jul 2023 S3, 24 Jul 2023 S4, 11 Sep 2024 S3, 23 Sep 2024 S3. All 7 questions below, oldest first.
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Question 1
14 Jul 2023 S1
61If 7b−4b1=7, then what is the value of 16b2+49b21?
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Question 2
19 Jul 2023 S2
68If (3y−y3)=5, find the value of (y2+y21).
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Question 3
20 Jul 2023 S2
68If (5y+y5)=11, find the value of (y2+y21).
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Question 4
20 Jul 2023 S3
73If (2y+y2)=7, find the value of (y2+y21).
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Question 5
24 Jul 2023 S4
67If (4y−y4)=13, find the value of (y2+y21).
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Question 6
11 Sep 2024 S3
61If x+9x1=3, then the value of 9x2+9x21 is:
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Question 7
23 Sep 2024 S3
57Let 3t−3t1=3, then which of the following expressions has the value equal to 12?
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