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Find the term independent of x in (4x^...

Find the term independent of x in `(4x^3 + (7)/(x^2))^14`

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To find the term independent of \( x \) in the expression \( (4x^3 + \frac{7}{x^2})^{14} \), we will use the Binomial Theorem. ### Step-by-Step Solution: 1. **Identify the General Term**: The general term \( T_{r+1} \) in the expansion of \( (a + b)^n \) is given by: \[ T_{r+1} = \binom{n}{r} a^{n-r} b^r \] For our expression, \( a = 4x^3 \), \( b = \frac{7}{x^2} \), and \( n = 14 \). Therefore, the general term becomes: \[ T_{r+1} = \binom{14}{r} (4x^3)^{14-r} \left(\frac{7}{x^2}\right)^r \] 2. **Simplify the General Term**: We can simplify \( T_{r+1} \): \[ T_{r+1} = \binom{14}{r} (4^{14-r} x^{3(14-r)}) \left(\frac{7^r}{x^{2r}}\right) \] This simplifies to: \[ T_{r+1} = \binom{14}{r} 4^{14-r} 7^r x^{3(14-r) - 2r} \] \[ = \binom{14}{r} 4^{14-r} 7^r x^{42 - 5r} \] 3. **Find the Term Independent of \( x \)**: To find the term independent of \( x \), we need to set the exponent of \( x \) to zero: \[ 42 - 5r = 0 \] Solving for \( r \): \[ 5r = 42 \quad \Rightarrow \quad r = \frac{42}{5} = 8.4 \] 4. **Conclusion**: Since \( r \) must be a non-negative integer and \( \frac{42}{5} \) is not an integer, there is no value of \( r \) that will give us a term independent of \( x \). Therefore, there is no term independent of \( x \) in the expansion. ### Final Answer: The term independent of \( x \) does not exist in the expansion, hence the answer is 0.
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