If 7 th and 13 th terms of an A.P. be 34 and 64 respectively, then its 18 th ter
If 7 th and 13 th terms of an A.P. be 34 and 64 respectively, then its 18 th term is
If S 1 is the sum of an arithmetic progression of ‘n’ odd number of terms an
If S 1 is the sum of an arithmetic progression of ‘n’ odd number of terms and S 2 is the sum of the…
If the sum of it terms of an A.P. is 2n 2 + 5n, then its nth term is
If the sum of it terms of an A.P. is 2n 2 + 5n, then its nth term is
If the first term of an A.P. is 2 and common difference is 4, then the sum of it
If the first term of an A.P. is 2 and common difference is 4, then the sum of its 40 term is
The n th term of an A.P., the sum of whose n terms is S n , is
The n th term of an A.P., the sum of whose n terms is S n , is
Which term of the A.P. 24, 21, 18, ………… is the first negative term?
Which term of the A.P. 24, 21, 18, ………… is the first negative term?
If 18, a, b – 3 are in A.P. then a + b =
If 18, a, b – 3 are in A.P. then a + b =
15 th term of A.P., x – 7, x – 2, x + 3, …….. is
15 th term of A.P., x – 7, x – 2, x + 3, …….. is
If 18 th and 11 th term of an A.P. are in the ratio 3 : 2, then its 21 st and 5
If 18 th and 11 th term of an A.P. are in the ratio 3 : 2, then its 21 st and 5 th…
If an A.P. has a = 1, t n = 20 and s n = 399, then value of n is :
If an A.P. has a = 1, t n = 20 and s n = 399, then value of n is :
The sum of first five multiples of 3 is:
The sum of first five multiples of 3 is:
(1) + (1 + 1) + (1 + 1 + 1) + ……. + (1 + 1 + 1 + …… n – 1 times) = …..
(1) + (1 + 1) + (1 + 1 + 1) + ……. + (1 + 1 + 1 + …… n – 1…