Question

Please help me answer and explain number 55

Answer 1

Answer:

D

Step-by-step explanation:

An operation of two real numbers is defined by the rule

$a\bigotimes b=b^a+2ab$

Calculate $2\bigotimes (1\bigotimes 3).$ First evaluate the expression in brackets:

$1\bigotimes 3=1^3+2\cdot 1\cdot 3=1+6=7$

Now,

$2\bigotimes (1\bigotimes 3)=2\bigotimes 7=2^7+2\cdot 2\cdot 7=128+28=156$