If the coefficients of x3 and x4 in the expansion of (1 + ax + bx2) (1 - 2x)18 in powers of x are both zero, then (a, b) is equal to :
As we have learned
Expression of Binomial Theorem -
- wherein
for n +ve integral .
coeff of
coeff of
and
and
a = 16
b = 272/3
Option 1)
Option 2)
Option 3)
Option 4)
Study 40% syllabus and score up to 100% marks in JEE