In an A.P. a = -36, d = 18 and l = 36, then n is : 1. 10 2. 5 3. 15 4. 20

Let nth be the last term. By formula, a n = a + (n - 1)d Substituting values we get : ⇒ 36 = -36 + (n - 1)18 ⇒ 36 = -36 + 18n - 18 ⇒ 36 + 36 + 18 = 18n ⇒ 18n = 90 ⇒ n = = 5. Hence, Option 2 is the correct option.

If A, B and C are three arithmetic progressions (APs) as given below :
A = 2, 4, 6, 8, …….. upto n terms
B = 3, 6, 9, 12, …… upto n terms
C = 0, 4, 8, 12, …… upto n terms, then
out of A + B, A - C, C - B and B - A which is/are A.P. ?
A + B
A - C
C - B
All are A.P.

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2k - 7, k + 5 and 3k + 2 are in A.P.; the value of k is :
-9
6
-7
5

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Do the numbers 1², 5², 7², 73 ….. form an A.P. ? If yes, its next term will be :
Yes, 11²
No
Yes, 97
Yes, 24

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The sum of first 10 even natural numbers is :
120
110
65
120

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Mathematics

In an A.P. a = -36, d = 18 and l = 36, then n is :
10
5
15
20

AP GP

Related Questions

If A, B and C are three arithmetic progressions (APs) as given below :
A = 2, 4, 6, 8, …….. upto n terms
B = 3, 6, 9, 12, …… upto n terms
C = 0, 4, 8, 12, …… upto n terms, then
out of A + B, A - C, C - B and B - A which is/are A.P. ?
A + B
A - C
C - B
All are A.P.

2k - 7, k + 5 and 3k + 2 are in A.P.; the value of k is :
-9
6
-7
5

Do the numbers 1², 5², 7², 73 ….. form an A.P. ? If yes, its next term will be :
Yes, 11²
No
Yes, 97
Yes, 24

The sum of first 10 even natural numbers is :
120
110
65
120

Mathematics

In an A.P. a = -36, d = 18 and l = 36, then n is :1051520

AP GP

Related Questions

If A, B and C are three arithmetic progressions (APs) as given below :A = 2, 4, 6, 8, …….. upto n termsB = 3, 6, 9, 12, …… upto n termsC = 0, 4, 8, 12, …… upto n terms, thenout of A + B, A - C, C - B and B - A which is/are A.P. ?A + BA - CC - BAll are A.P.

2k - 7, k + 5 and 3k + 2 are in A.P.; the value of k is :-96-75

Do the numbers 12, 52, 72, 73 ….. form an A.P. ? If yes, its next term will be :Yes, 112NoYes, 97Yes, 24

The sum of first 10 even natural numbers is :12011065120

In an A.P. a = -36, d = 18 and l = 36, then n is :
10
5
15
20

If A, B and C are three arithmetic progressions (APs) as given below :
A = 2, 4, 6, 8, …….. upto n terms
B = 3, 6, 9, 12, …… upto n terms
C = 0, 4, 8, 12, …… upto n terms, then
out of A + B, A - C, C - B and B - A which is/are A.P. ?
A + B
A - C
C - B
All are A.P.

2k - 7, k + 5 and 3k + 2 are in A.P.; the value of k is :
-9
6
-7
5

Do the numbers 1², 5², 7², 73 ….. form an A.P. ? If yes, its next term will be :
Yes, 11²
No
Yes, 97
Yes, 24

The sum of first 10 even natural numbers is :
120
110
65
120