What are the coefficients for the binomial expansion of (a + b)^3?

Required coefficient :coefficient of 1st, 2nd, 3rd and 4th term are 1, 3,3,1 respectively.

Explanation:  

Formula for binomial expansion is

We will substitute the values a=a, b=b and n=3  in the formula for binomial expansion we will get

After simplification of the terms we will get

Since,

Therefore the required coefficient : coefficients of 1st, 2nd, 3rd and 4th term are 1, 3,3,1 respectively.

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

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