Given, x5+72=32
Transposing 72 to RHS, we get
⇒ x5=32−72
⇒ x5=−42 ⇒ x5=−2
Multiplying both sides by 5, we get
x=−10
Question 6
Which of the following expressions show that rational numbers are associative under multiplication. (a) 23×(−67×35)=(23×−67)×35 (b) 23×(−67×35)=23×(35×−67) (c) 23×(−67×35)=(35×23)×−67 (d) (23×−67)×35=(−67×23)×35