Friday 6 January 2017

EXPONENTIALS 1A


If 52w (40w) = 1000000 ; Find w.

Solution

52w (40w) = 1000000

(52)w (40w) = 106

(25)w (40w) = 106

(25 x 40)w = 106

(1000)w = 106

(103)w = 106

103w = 106   (Bases are alike, so they cancel out)

3w = 6

3w = 62
3       3

w = 2

TRY THIS…………………………….


If 42t (4t) = 128 ; Find t.

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