Question

What is 20th term of 3,5,7...?

Answer 1

Ap: 3,5,7,9. 20th term : a +19d. a= 3. d= 2.

Answer 2

Answer:

Concept:

An arithmetic progression (AP) is a sequence of numbers in order in which the difference between any two consecutive numbers is a constant value. Also called an arithmetic sequence.

Find:

Find the 20th term

Given:

3,5,7...?

Step-by-step explanation:

Arithmetic progression is defined as a sequence of numbers, for each pair of consecutive terms we get a second number by adding a constant to the first. The constant that must be added to any term of AP to obtain the next term is known as the common difference (C.F) of the arithmetic progression.

Arithmetic progression is commonly referred to as AP. In AP, there are 3 main terms that are used to solve math problems:

(i) Common difference (d)

(ii) n= period (an)

(iii) Sum of first n terms (Sn)

According to question

a=3

d = 5-3

d = 2

n= 20

$a_{n} = a + (n - 1)d$

$a_{20} = 3+ (20 - 1)2$

$a_{20} = 3+ (19)2$

$a_{20} = 3+ 38$

$a_{20} = 41$

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