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Q6 of 40 Page 1

The value of k, for which the pair of linear equations kx + y = k2 and x + ky = 1 have infinitely many solutions is

For infinitely many solutions


⇒ k2 = 1


k = ±1


Also k3 = 1 ⇒ k = 1


∴ value of k satisfying the whole equation is only 1

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4

If ΔABC ~ DEF such that AB = 1.2 mm and DE = 1.4 cm, the ratio of the areas of ΔABC and Δ DEF is

5

The value of λ for which (x2 + 4x + λ) is a perfect square, is

7

The value of k for which the points A(0, 1), B(2, k) and C(4, –5) are collinear is

8

The value of p for which (2p + 1), 10 and (5p + 5) are three consecutive terms of an AP is

A . –1


B . –2


C . 41


D . 2


OR


The number of terms of an AP 5, 9, 18, … 185 is


A . 31 B . 51


C . 41 D . 40


Questions · 40
Set-III
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