Using precise definitions of limits, prove that lim x → 0 f ( x ) does not exist: f ( x ) = { 1 i f x i s r a t i o n a l 0 i f x i s i r r a t i o n a l (Hint: Think about how you can always choose a rational number 0 < r < d, but | f ( r ) − 0 | = 1 .)
Using precise definitions of limits, prove that lim x → 0 f ( x ) does not exist: f ( x ) = { 1 i f x i s r a t i o n a l 0 i f x i s i r r a t i o n a l (Hint: Think about how you can always choose a rational number 0 < r < d, but | f ( r ) − 0 | = 1 .)
Using precise definitions of limits, prove that
lim
x
→
0
f
(
x
)
does not exist:
f
(
x
)
=
{
1
i
f
x
i
s
r
a
t
i
o
n
a
l
0
i
f
x
i
s
i
r
r
a
t
i
o
n
a
l
(Hint: Think about how you can always choose a rational number 0 < r < d, but
|
f
(
r
)
−
0
|
=
1
.)
=
Q6 What will be the allowable bearing capacity of sand having p = 37° and ydry
19 kN/m³ for (i) 1.5 m strip foundation (ii) 1.5 m x 1.5 m square footing and
(iii)1.5m x 2m rectangular footing. The footings are placed at a depth of 1.5 m
below ground level. Assume F, = 2.5. Use Terzaghi's equations.
0
Ne
Na
Ny
35 57.8 41.4 42.4
40 95.7 81.3 100.4
Q1 The SPT records versus depth are given in table below. Find qan for the raft 12%
foundation with BxB-10x10m and depth of raft D-2m, the allowable
settlement is 50mm.
Elevation, m 0.5 2
2 6.5 9.5 13 18 25
No.of blows, N 11 15 29 32 30 44
0
estigate shear
12%
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