GATE CE 2015 Set 1 — Question 5
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General Aptitude → Analytical Aptitude → Numerical Relations & Reasoning
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Question
A function is linear and has a value of 29 at and 39 at . Find its value at .
Correct answer
(C) 43
Solution
A linear function is of the form .
Given:
1)
2) Subtracting equation (1) from (2):
Substitute into equation (2):
So, the function is .
At :
.
Given:
1)
2) Subtracting equation (1) from (2):
Substitute into equation (2):
So, the function is .
At :
.
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