Published by:
CGP EDU Academic Team
Published on: August 12, 2026
Let 
. If 
and 
, then 2(a + b + c) is equal to
Text Solution
Verified by ExpertsThe correct answer is:
C
Given that (a + bx + ex 2 ) 10 = 
General term 
For coefficient. of x: r 2 + 2r 3 = 1
Let 
coefficient of 
a
9 -b = 2......(i)
Coefficient of 
9a 8 6 2 + 2a 9 .c = 42.......(ii)
As a, b, c 
N, so by hit and trial in equation (i) & (ii) we get, a = 1, b = 2, c = 3
Hence,2(a +b +c)= 2(3 + 2 + 1)= 12
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