Advertisements
Advertisements
Question
The 20th term of an A.P, whose first term is – 2 and the common difference is 4, is ______.
Options
78
74
– 36
– 34
Solution
The 20th term of an A.P, whose first term is – 2 and the common difference is 4, is 74.
Explanation:
an = a + (n – 1) d
a20 = – 2 + 19 × 4 = 74
APPEARS IN
RELATED QUESTIONS
Find 26th term from last of an AP 7, 15, 23……., 767 consits 96 terms
Which term of the sequence –1, 3, 7, 11, ….. , is 95 ?
Write first four terms of the A.P. when the first term a and the common differenced are given as follows:
a = 10, d = 10
Following are APs or not? If they form an A.P. find the common difference d and write three more terms:
12, 52, 72, 73 …
For an A.P., find S7 if a = 5 and d = 4.
For the following arithmetic progressions write the first term a and the common difference d:
−1.1, −3.1, −5.1, −7.1, ...
is the Consider the expression an = 2n − 1, AP .
The first term of an arithmetic progression is unity and the common difference is 4. Which of the following will be a term of this A.P.
Choose the correct alternative answer for the following sub-question
Find t3 = ? in an A.P. 9, 15, 21, 27, ...
1, 6, 11, 16 ...... Find the 18th term of this A.P.
