aₙ = 2ⁿ - NCERT Class XI Mathematics - Sequences and Series

NCERT Class XI Mathematics - Sequences and Series - Solutions

Question : 3 of 106

Marks: +1, -0

a_n

2^n

Solution:

We have,

a_n

2^n

Substituting n = 1, 2, 3, 4, 5, we get

a_1

2^1

= 2;

a^2

2^2

= 4;

a^3

2^3

= 8;

a^4

2^4

= 16;

a_5

2^5

= 32.

∴ The first five terms are 2, 4, 8, 16, 32.

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