Question on: JAMB Mathematics - 2015
Simplify 4 √[(390695T− 8)½)]
A
1/T
B
2T
C
5/T
D
T/5
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Correct Option: C
4√(390625T − 8)½
[(390625T − 8)½]¼
[((390625)½ × T − 8)½]¼
(√ 390625 × T − 4 )¼
(625 × T −¼)¼
(54 × T −4)¼
= (54)¼ × (T − 4 )¼
= 5 × T − 1
= 5 × 1/T
= 5/T
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