Question

1) ( 4-¹ + 6-¹ + 8-¹ ) ⁰ = _______ .
2) x = (5/8)-² × (12/15)-² , then the value of x-³ is _______ .
3) Solve for x : 81-² ÷ 729 -¹-x = 9²^x
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Answer 1

Answer:

Exercise 13.1

Question 1:

Find the value of:

(i) 26 (ii) 93 (iii) 112 (iv) 54

Answer:

(i) 26 = 2 * 2 * 2 * 2 * 2 * 2 = 64

(ii) 93 = 9 * 9 * 9 = 729

(iii) 112 = 11 * 11 = 121

(iv) 54 = 5 * 5 * 5 * 5 = 625