Question

The coefficient of x in the expansion of $(x+3{)}^3$ is
(a) 1 (b) 9 (c) 18 (d) 27

Answer 1

ANSWER:
$(x+3{)}^3$
$=x{3}^{+}{3}^3+9x(x+3)$
$=x^3+27+9x^2+27x$
So, the coefficient of x in $(x+3{)}^3$ is 27.
Hence, the correct answer is the option (d).