Check Tricks to solve surds and indices from Government exam section on e akhabaar
- Laws of Indices:
- am x an = am + n
- (am)n = amn
- (ab)n = anbn
- a0 = 1
- Surds: Let a be rational number and n be a positive integer such that a(1/n) = aThen, a is called a surd of order n.
- Laws of Surds:
- a = a(1/n)
- ab = a x b
-
= a b - (a)n = a
- (a)m = am
2. Given that 100.48 = x, 100.70 = y and xz = y2, then the value of z is close to
3. If 5a = 3125, then the value of 5(a – 3) is:
4. (256)0.16 x (256)0.09 = ?
(25)7.5 x (5)2.5 ÷ (125)1.5 = 5?
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