Question

1. The nth term of the A.P. 63, 65, 67, 69, ........and the A.P. 3, 10, 17, 24,........ are
equal, then the value of 'n is
1
a) 15
b) 13
c) 12
d) 14
2. If the angles of a right angled triangle are in A.P. then the angles of that
triangle will be
a) 45°, 45°, 90°
b) 30°, 60°, 90°
c) 40°, 50°, 90°
d) 20°, 70°, 90°
3. The common difference of an A.P. in which 018 - 214 = 32 is
a) - 8
b) 6
c) 8
d) - 6
4. Which of the following is not an A.P.?
a) 2,5/2,3,7/2,
b) a, 2a, 3a, 4a, .......
c) - 1.2, -3.2, -5.2- 7.2........ d) 2, 4, 8, 16, ...........
​

Answer 1

Answer:

2.b)

4.d)

other questions are not clear

plz make it accurate

Answer 2

Explanation:

A.P. 63 , 65 , 67 , 69........... के लिए

a = 63 , d = 65-63 = 2

और

A.P. 3 , 10 , 17 ,24 ,............ के लिए

a = 3 , d = 10-3 = 7

according to question :--

a + (n-1)d = a + (n-1)d

63 + (n-1)2 = 3 + (n-1)7

63 - 3 = 7(n-1) - 2(n-1)

60 = 5(n-1)

12 = n - 1

n - 1 = 12

n = 13