Question:medium
The coefficient of \( x^4 \) in the expansion of \( (1-2x)^5 \) is equal to:
The coefficient of \( x^4 \) in the expansion of \( (1-2x)^5 \) is equal to:
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When the first term of the binomial is 1, the expansion simplifies significantly as \( 1^{n-r} \) is always 1. Pay close attention to the sign of the second term; since the power \( r=4 \) is even, the negative sign in \( (-2x)^4 \) becomes positive.
Updated On: May 1, 2026
- \( 40 \)
- \( 320 \)
- \( -320 \)
- \( -32 \)
- \( 80 \)
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The Correct Option is
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