CBSE [ All India ]_XII_Mathematics_2011_Set I
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Q1
Let A = {1, 2, 3}, B = {4, 5, 6, 7} and let
f = {(1, 4), (2, 5), (3, 6)} be a function
from A to B. State whether f is one-one or not.Marks:1View AnswerAnswer:
We have f = {(1, 4), (2, 5), (3, 6)} is a function
from A to B.
∴ f (1) = 4, f (2) = 5, f (3) = 6
Here, we see that the images of distinct elements of A under f are distinct.
Hence, function f is one-one. -
Q2
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Q3
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Q4
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Q5
If a matrix has 5 elements, write all possible orders it can have?
Marks:1View AnswerAnswer:
All possible orders are 1 x 5 and 5 x 1.
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Q6
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Q7
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Q8
Write the direction-cosines of the line joining the points (1, 0, 0) and (0, 1, 1).
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Q9
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Q10
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