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q = √8/3
p . q = √2/3 . √8/3
= √16/9
= 4/3 (c)
116. √x = y
(√x = y)²
x = y² (a)
117. √a² . b²/c²
= a¹ . b¹/c¹
= ab/c (c)
118. a = 24b = 24.3c = 72c
b = 3c
√6 . 72 c . 3c / c
√1296c² / c
36c/c
= 36 (d)
119. p = √12,3
q = √1,23
√123 - √0,123
√1,23.100 - √12,3 .10⁻²
10q - 1/10p (b)
120. √190,4 = 13,8
√19,04 = 4,36
√190.400 = √19,04 . 10⁴
= 4,36 . 10²
= 436 (b)
121. √1,65 = 1,28
√16,5 = 4,06
√0,0165 = √1,65 . 10⁻²
= 1,28 . 0,1
= 0,128 (c)