Question

101. The value of (6.25)-1/2 is:
(A) 0.25
(B) 0.5
(C) 0.4
(D) 2.5​

Answer 1

Answer:

2.5 is the answer for this question

Answer 2

101. The value of (6.25)-1/2 is:

(C) 0.4

To find the value of (6.25)^(-1/2).

First of all, let us see what negative exponential means.

We know, a^(-n) = 1/(a^n). So,

(6.25)^(-1/2) is equal to 1/[(6.25)^(1/2)]

= 1/√6.25                                                     [Exponential of half means square root].

= 1/√(2.5×2.5)                                              [6.25 = 2.5×2.5]

= 1/2.5

= 10/25

= 2/5

= 0.4

Thus option (C) is correct.