Question

Which one of the following is the common factor of (47^43 +43^43) and (47^47 +43^47):
A) 90
B) 4
C) 4743 + 4343
D) None of these​

Answer 1

Answer:

(47^43+43^43)+(47^47+43^47)

3.93721999E+78

approximately 4

so option is B...

Answer 2

Answer:

When n is odd, (x ^n +a ^n ) is always divisible by (x + a). Each one of (47 ^43 +43  ^43  ) and (47^ 47 +43^47  ) is divisible by (47+43).