Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The coefficient of x 7 in (1- x + 2x 3 ) 10 is__________.
Text Solution
Verified by ExpertsThe correct answer is:
960
(960)
We need to find the coefficient of x 7 in (1 - x + 2x 3 ) 10 .
We know that for (x + y + z) n ,
such that a + b + c = n
Now for (1-x+2x 3 ) 10 T n = 
a (-x) b (2x 3 ) c = 
(-1)
b 2 c x b+3c . with a + b + c = 10
Here we need coefficient of x 7 .
Hence the combinations would be
which satisfies both a + b + c = 10 and b + 3c = 7.
Hence, coefficient of x 7 will be,
=960
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