1
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

The locus of the mid-point of the chord if contact of tangents drawn from points lying on the straight line $$4x - 5y = 20$$ to the circle $${x^2} + {y^2} = 9$$ is

A
$$20({x^2} + {y^2}) - 36x + 45y = 0$$
B
$$20({x^2} + {y^2}) + 36x - 45y = 0$$
C
$$36({x^2} + {y^2}) - 20x + 45y = 0$$
D
$$36({x^2} + {y^2}) + 20x - 45y = 0$$
2
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

Let $$f(x) = \int {{{{x^2}dx} \over {(1 + {x^2})(1 + \sqrt {1 + {x^2}} )}}} $$ and $$f(0) = 0$$, then the value of $$f(1)$$ be

A
$$\log (1 + \sqrt 2 )$$
B
$$\log (1 + \sqrt 2 ) - {\pi \over 4}$$
C
$$\log (1 + \sqrt 2 ) + {\pi \over 2}$$
D
None of these
3
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

The mean of five observations is 4 and their variance is 5.2. If three of these observations are 1, 2 and 6, then the other two are

A
2 and 9
B
3 and 8
C
4 and 7
D
5 and 6
4
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

In a sequence of 21 terms, the first 11 terms are in AP with common difference 2 and the last 11 terms are in GP with common ratio 2. If the middle term of AP be equal to the middle term of the GP, then the middle term of the entire sequence is

A
$$-\frac{10}{31}$$
B
$$\frac{10}{31}$$
C
$$\frac{32}{31}$$
D
$$-\frac{31}{32}$$
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