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All India - 2017
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Q28 of 47 Page 1

Solve for x:

, where


Given,







Conclusion: Therefore, solutions of are -2,-2


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19

How many terms of an A.P. 9, 17, 25, … must be taken to give a sum of 636 ?

20

If the roots of the equation (a2 + b2)x2 – 2(ac + bd)x + (c2 + d2) = 0 are equal, prove that .

29

A takes 6 days less than B to do work. If both A and B working together can do it in 4 days, how many days will B take to finish it ?

30

From the top of a tower, 100 m high a man observes two cars on the opposite sides of the tower and in same straight line with its base, with angle of depression 30° and 45°. Find the distance between the cars. [Take √3 = 1.732]

Questions · 47
All India - 2017
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