# Write the First Five Terms of the Following Sequences Whose Nth Terms Are: A_N = 3^N - Mathematics

Write the first five terms of the following sequences whose nth terms are:

a_n = 3^n

#### Solution

a_n = 3^n

Here, the nth term is given by the above expression. So, to find the first term we use

n = 1 we get

a_1 = 3^(1)

= 3

Similarly, we find the other four terms,

Second term (n = 2)

a_2 = 3^(2)

= (3)(3)

= 9

Third term (n = 3)

a_3 = 3^(3)

= (3)(3)(3)

= 27

Fourth term (n = 4)

a_4 = 3^(4)

= (3)(3)(3)(3)

= 81

Fifth term (n = 5)

a_5 = 3^(5)

= (3)(3)(3)(3)(3)

= 243

Therefore, the first five terms for the given sequence are

a_1 = 3, a_2 = 9, a_3 = 27, a_4 = 81. a_5 = 243

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#### APPEARS IN

RD Sharma Class 10 Maths
Chapter 5 Arithmetic Progression
Exercise 5.1 | Q 1.3 | Page 5