Out of the following, the number which is not equal to - 8/27 is
a. -(2/3)³
b. (-2/3)³
c. -(-2/3)³
d. (-2/3) × (-2/3) × (-2/3)
Solution:
Given, the number is -8/27
We have to find the number which is not equal to -8/27
From the option,
(a) -(2/3)³ = -[(2×2×2)/(3×3×3)]
= -(8/27)
(b) (-2/3)³ = (-2×-2×-2)/(3×3×3)
= -8/27
(c) -(-2/3)³ = -[(-2×-2×-2)/(3×3×3)]
= -(-8/27)
= 8/27
(d) (-2/3) × (-2/3) × (-2/3) = (-2×-2×-2)/(3×3×3)
= -8/27
Therefore, -(-2/3)³ is not equal to -8/27.
✦ Try This: (3)⁵ × (3)³ is equal to
☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 13
NCERT Exemplar Class 7 Maths Chapter 11 Sample Problem 1
Out of the following, the number which is not equal to - 8/27 is a. -(2/3)³, b. (-2/3)³, c. -(-2/3)³, d. (-2/3) × (-2/3) × (-2/3)
Summary:
Out of the following, the number which is not equal to - 8/27 is -(-2/3)³
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