Question

1. Evaluate:
() (53)* * (5-2)
(ii) (7-2)* * (343)
82
(0) 27" x 32-3m
(vi)​

Answer 1

Answer:

Step-by-step explanation:

51

If 22n−1=18n−3, then the value of n is :

A. 3B. 2

C. 0D. - 2

Answer & Explanation

Answer : Option B

Explanation :

22n−1=18n−3  ⇔   22n−1 = 1(23)n−3 = 123(n−3)  =  123n−9=  29−3n

                                         ⇔    2n−1= 9−3n      ⇔     5n   =10       ⇔     n=2