Advertisements
Advertisements
Question
Find the first term and common difference of the Arithmetic Progressions whose nth term is given below
tn = 4 – 7n
Solution
a = t1 = 4 – 7(1)
= 4 – 7 = – 3
d = t2 – t1
Here t2 = 4 – 7(2)
= 4 – 14 – 10
∴ d = t2 – t1
= 10 – (– 3) = – 7
APPEARS IN
RELATED QUESTIONS
Which of the following sequences are arithmetic progressions? For those which are arithmetic progressions, find out the common difference.
1.0, 1.7, 2.4, 3.1, ...
The 10th and 18th terms of an A.P. are 41 and 73 respectively. Find 26th term.
The first term and the common difference of an A. P. is 10,000 and
2000 resectively. Find the sum of first 12 terms of the A.P.
is the Consider the expression an = 2n − 1, AP .
The product of four consecutive positive integers is 840. Find the numbers.
Check whether the following sequence is in A.P.
`1/2, 1/3, 1/4, 1/5, ...`
Find x, y and z, given that the numbers x, 10, y, 24, z are in A.P.
If 2x, x + 10, 3x + 2 are in A.P., then x is equal to ______.
In which of the following situations, do the lists of numbers involved form an AP? Give reasons for your answers
The amount of money in the account of Varun at the end of every year when Rs 1000 is deposited at simple interest of 10% per annum.
How many terms are present in the sequence of A.P. 6, 11, 16, 21, ......... whose sum is 969?
