Tuesday 25 March 2014

EXPONENTS C2



If 52w (4w) = 10 ; Find w.

Solution

52w (4w) = 10

(52)w (4w) = 10

(25)w (4w) = 10

(25 x 4)w = 10

(100)w = 10

(102)w = 10

102w = 101   (Bases are alike, so they cancel out)

2w = 1

2w = 1
2       2

w = 1/2

TRY THIS…………………………….


NECTA 2004 QN. 4b

If 32t (4t) = 6 ; Find t.


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