Question

If nth term of an A.P is 2n + 5, then its common difference is
A) 3
B) 5
C) 2
D) 7
11.In an A.P, 7a7 = 11a11, then a18 =
A) 18
B) 1
C) 0
D) 4
12.If an = (n –1) (n – 2), then 1a =
A) 0
B) 1
C) 2
D) –2
13.The A.M of first ‘n’ natural numbers is
A) n(n + 1)
B)
$\frac{n + 1}{2}$
C) (n + 1)
D)
$\frac{n \times 1}{2}$
14.The value of ‘k’ if the distance between (2, k) and (– 1, 7) is 5.
A) 6
B) 3
C) 1
D) 9
15.The distance between the lines x = k and x = – p is
A) k units
B) p units
C) (k – p) units
D) (k + p) units
16.The mid point of (sin2α, sec2α) and (cos2α, – tan2α) is
A) (1, –1)
B) (– 1, 1)
C)
$\frac{1}{2} \frac{1}{2}$
D) (1, 1)
17.A point on the X - axis is
A) (2, 3)
B) (2, 0)
C) (0, 4)
D) (0, – 3)​

Answer 1

Answer:

(1) 2

(2) 18

(3) 1

(4) n(n+1)

(5) 9

(6) I don't know

(7) 1/2,1/2

(8)Equal to zero

Step-by-step explanation:

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