Find the value of 9^(-1/2)

Find the value of 9-1/2. For this question we need to know indices rules. We apply two rules here as the power is negative and because it's a fraction. First, let's tackle the negative power rule. When the indice is a negative, we take the base (9) and we turn it into a reciprocal. 9-1/2 = 1/91/2The second indice rule is the fraction, this affects only the number 9. The denominator of the indice tells us what root of 9 we need to find. The numerator tells us the power to raise the answer to. Carrying on from 1/91/2, the square root of 9 = 3 and 3 to the power of 1 = 3. The answer is 1/3.

Answered by Janifa Y. Maths tutor

34622 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve simultaneously 2x+3y=8, 3x+2y=7 to calculate values of x and y.


Solve x^2+6x+1=0 by completing the square


What is 64^(2/3)?


Q = P / (R (4-t)), P=36, R= 3, t=-2


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences