Mathematics
Assertion (A): For an A.P., T22 = 149 and d = 7. Then S22 is 1661. Reason (R): The sum of first n terms of an A.P. is given by Sn = . 1. A is true, R is false 2. A is false, R is true 3. Both A and R are true 4. Both A and R are false
Related Questions
Assertion (A): The 10th term from the end of the A.P. 17, 14, 11, … −40 is −11.
Reason (R): The nth term of an A.P. is given by tn = a + (n − 1)d.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
Assertion (A): If the sum of first n terms of an A.P. is given Sn = 2n2 − n, then its nth term is 4n - 3.
Reason (R): The nth term (tn) of an A.P. from the end is l - (n - 1)d.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false, but R is true.
(a) Write the nth term (Tn) of an Arithmetic Progression (A.P.) consisting of all whole numbers which are divisible by 3 and 7.
(b) How many of these are two-digit numbers? Write them.
(c) Find the sum of first 10 terms of this A.P.