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WBJEE 2016 Math Solved Paper
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© examsnet.com
Question : 34
Total: 75
If
log
0.3
(x - 1) <
log
0.09
(x - 1), then x lies in the interval
(2, ∞)
(1, 2)
(-2, -1)
None of these
Validate
Solution:
log
0.3
(
x
−
1
)
<
log
0.3
2
(x - 1)
⇒
log
0.3
(
x
−
1
)
2
<
log
0.3
(x - 1)
⇒
(
x
−
1
)
2
> x - 1 (0.3 < 1)
⇒ (x - 1) (x - 2) > 0 ⇒ x < 1, x > 2 ⇒ x > 2(x < 1)
© examsnet.com
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