Aptitude - Surds and Indices - Discussion

Discussion Forum : Surds and Indices - General Questions (Q.No. 10)

Surds and Indices

10.

(0.04)^-1.5 = ?

125

250

625

Answer: Option

Explanation:

(0.04)^-1.5 =		4		-1.5
		100

=		1		-(3/2)
		25

= (25)^(3/2)

= (5²)^(3/2)

= (5)^{2 x (3/2)}

= 5³

= 125.

Discussion:

27 comments Page 3 of 3.

Lunox said: 6 years ago

How did you get 4/100? Explain me.

Shubham said: 6 years ago

Thanks everyone for explaining it.

Sabitha said: 7 years ago

0.2 is equal to 1/5 @Monisha.

Savitri said: 9 years ago

How come 3/2 instead of 1.5?

RAVISHANKAR said: 7 years ago

It's reciprocal @Jayananda.

Viswa said: 5 years ago

4/100 = 1/25.
25*4 = 100.

(1)

Abhiroop Saha said: 1 decade ago

What is vulgar-fraction?

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