6. The value of x for which 2x, (x+10) and (3x+2) are the three consecutive terms of an AP, is
a) 6
b) -6
c) 18
d) -18
7. The first term of an AP is p and the common difference is q, then its 10th term is
a) q+9p
b) p-9q
c) p+9q
d) 2p+9q
8. The distance between the points (acosθ + b sinθ, 0) and (0, a sinθ - b cosθ), is
a) a2+b2
b) a2-b2
c) √(a2+b2)
d) √(a2-b2)
9. If the point P(k,0)divides the line segment joining the points A(2,-2) and B(-7,4) in the ratio 1:2, then the value of k is
a) 1
b) 2
c) -2
d) -1
10.The value of p, for which the points A(3,1), B(5,p) and C(7,-5) are collinear, is
a) -2b) 2c) -1d) 1