Thursday 2 August 2018

EXPONENTIALS 1


If 52w (40w) = 0.000001 ; Find w.

Solution

52w (40w) = 0.000001

(52)w (40w) = 10-6

(25)w (40w) = 10-6

(25 x 40)w = 10-6

(1000)w = 10-6

(103)w = 10-6

103w = 10-6   (Bases are alike, so they cancel out)

3w = -6

3w = -62
3       3

w = -2

TRY THIS…………………………   


If 42a (2a) = 128 ; Find a.

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