Let the coefficients of third, fourth and fifth terms in the expansion of (x+ax2)n,x≠0, be in the ratio 12:8:3. Then the term independent of x in the expansion, is equal to

Let the coefficients of third, fourth and fifth terms in the expansion

1.	Let the coefficients of third, fourth and fifth terms in the expansion of (x+ax2)n,x≠0, be in the ratio 12:8:3. Then the term independent of x in the expansion, is equal to
Answer» Let the coefficients of third, fourth and fifth terms in the expansion of ${(x + \frac{a}{x^{2}})}^{n}, x \neq 0,$ be in the ratio $12 : 8 : 3.$ Then the term independent of $x$ in the expansion, is equal to

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Let the coefficients of third, fourth and fifth terms in the expansion of (x+ax2)n,x≠0, be in the ratio 12:8:3. Then the term independent of x in the expansion, is equal to

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