1) If 5√5×53+5−32 =5a+2, then the value of a is: A) 4 B) 5 C) 6 D) 8 Answer: Option AExplanation:5√5×53+5−32 =5a+2 ⇔5×512×535−32 ⇔5(1+12+3+32) =5a+2 ⇔56 =5a+2 ⇔a+2=6 ⇔a=4