Q. Sum of the last 30 coefficients in the expansion of ${(1 + x)}^{59},$ when expanded in ascending powers of $x$ is
A) $2^{59}$
B) $2^{58}$
C) $2^{30}$
D) $2^{29}$
Explanation
(b)
Since, total number of terms $= 59 + 1 = 60$
$\therefore Required\ sum = \frac{2^{59}}{2} = 2^{58}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.