If log102 x express log1012 5 in terms of x - JAMB Mathematics 2007 Question
If log102 = x, express log1012.5 in terms of x
A
2(1 + x)
B
2 + 3x
C
2(1 - x)
D
2 - 3x
correct option: d
log1012.5 = log10 121/2
= log1025/2
= log1025 - log102
= log1052 - log102
= 2log105 - log102
= 2log1010/2 - log102
= 2(1-x)- x
= 2 - 2x – x
= 2 – 3x
Please share this, thanks:
#JAMB #JAMB
Add your answer
No responses