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Vanshika Sharma
Subject: Maths
, asked on 21/4/18
Solve this:
Q
.
L
e
t
f
(
x
)
=
sin
x
&
g
(
x
)
=
1
-
cos
2
x
2
I
s
f
=
g
?
Answer
2
Megha Prasadan
Subject: Maths
, asked on 21/4/18
Please solve
49.
A surveyor who wanted to calculate the area of a triangular plot of land measured two sides of the plot as 486 feet and 748 feet and measured the angle between these two sides as 71.3
°
. What is the area of the triangular plot, in acres? (1 acre = 43,560 square feet)
(A) 1.3
(B) 3.4
(C) 4.0
(D) 4.2
(E) 8.3
Answer
1
Megha Prasadan
Subject: Maths
, asked on 21/4/18
How to read and solve these kind of graphs?
30.
If the two periods of the periodic function f are shown in the figure above, what is f (186)?
(
A
)
-
2
(
B
)
-
1
(
C
)
0
(
D
)
1
(
E
)
2
Answer
1
Megha Prasadan
Subject: Maths
, asked on 21/4/18
Bothe the question pls solve!:
If t<3x, then 0<y<4
49. If the above statement is true and y=5, which of the following statements must be true ?
A
t
<
3
x
B
t
≤
3
x
C
t
=
3
x
D
t
>
3
x
E
t
≥
3
x
50. A laser operation is aiming a laser at the center of a circular disk in space. The disk has a radius of 50 feet and is situated 225 miles directly above the surface of the Earth where the laser is located. If the operator makes a 0.05
o
error in aiming the laser, by how many feet will the laser beam miss the edge of the disk?
(5,280 feet = 1 mile)
(A) 937
(B) 387
(C) 1,012
(D) 1,037
(E) The laser beam will not miss the disk.
Answer
2
Megha Prasadan
Subject: Maths
, asked on 21/4/18
38. If the domain of a function f is {1,2}, which of the following CANNOT be the range of f?
(A) {1}
(B) {3}
(C) {1,2}
(D) {3,4}
(E) {1,2,3}
How to solve these kinds?
Answer
2
Megha Prasadan
Subject: Maths
, asked on 21/4/18
How to solve these kinds?
Q35. The graph of
f
shown above. If
f
(x) =
1
g
x
, for which of the following values of x in [ –10, 10] could g(x) = 0?
(A) – 10
(B) 0
(C) 2
(D) 3
(E) 5
Answer
2
Megha Prasadan
Subject: Maths
, asked on 21/4/18
Whats the ans and how to solve these kinds?
Q22. In the xy-plane, the point (0,0) is on the graph of y=
f
(x). Which of the following points must be on the graph of y =
f
(x – 2) + 3 ?
(A) (2, –3)
(B) (2, 2)
(C) (2, 3)
(D) ( – 2, –3)
(E) (– 2, 3)
Answer
2
Vanshika Sharma
Subject: Maths
, asked on 21/4/18
Solve this :
Q.
Find the period of :
i
)
sin
x
.
cos
e
c
x
i
i
)
5
sin
(
2
2
x
)
+
7
cos
(
3
2
x
)
Answer
2
Vanshika Sharma
Subject: Maths
, asked on 21/4/18
Solve this :
Q
.
F
i
n
d
t
h
e
d
o
m
a
i
n
o
f
:
i
)
cos
-
1
3
4
+
2
sin
x
i
i
)
sin
-
1
1
+
x
2
2
x
+
cos
sin
x
i
i
i
)
sin
-
1
1
x
2
-
1
Answer
2
Riya Verma
Subject: Maths
, asked on 20/4/18
Q. Find in what ratio will the total wages of the workers of a factory be increased or decreased if there be a reduction in the number of workers in the ratio 15:11 and an increment in their wages in the ratio 22:25.
Answer
1
Souptik
Subject: Maths
, asked on 20/4/18
solve
Answer
1
Mitali
Subject: Maths
, asked on 20/4/18
Please solve in the best possible way
Q
u
e
s
t
i
o
n
b
o
.
14
I
f
1
+
x
+
x
2
=
a
0
+
a
1
x
+
a
2
x
2
+
.
.
.
.
.
.
.
.
.
+
a
200
x
200
,
t
h
e
n
w
h
i
c
h
o
f
t
h
e
f
o
l
l
o
w
i
n
g
r
e
s
u
l
t
a
r
e
c
o
r
r
e
c
t
?
A
.
a
37
=
a
163
B
.
a
37
=
a
161
C
.
a
0
2
-
a
1
2
+
a
2
2
-
.
.
.
.
.
.
.
.
.
.
.
+
a
200
2
=
a
100
D
.
a
0
2
-
a
1
2
+
a
2
2
-
.
.
.
.
.
.
.
.
.
.
.
+
a
200
2
=
a
200
Answer
1
Aditya
Subject: Maths
, asked on 19/4/18
If.R1.and. R2 are two equivalence relation then R1 U R2 is not transitive ? Why ?
Answer
1
Samriddhi Chaturvedi
Subject: Maths
, asked on 19/4/18
Are trivial relations only based on product of a single set by itself?Because I have seen such cases only used in examples and explanations for empty and universal relations.
Answer
2
Amitesh Kumar
Subject: Maths
, asked on 19/4/18
Q. Let f(x+p) = 1+(2-3f(x)+3(f(x)
)
3
)
1
/
3
,
∀
x
∈
R
,
where p>0, prove that f(x) is periodic.
Q. Let f(x) be a function such that ; f(x-1)+f(x+1) =
3
f(x) ,
∀
x
∈
R
,
. If f(5)= 100, find
∑
r
=
0
99
f
5
+
12
r
.
Answer
2
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What are you looking for?
49. A surveyor who wanted to calculate the area of a triangular plot of land measured two sides of the plot as 486 feet and 748 feet and measured the angle between these two sides as 71.3. What is the area of the triangular plot, in acres? (1 acre = 43,560 square feet)
(A) 1.3
(B) 3.4
(C) 4.0
(D) 4.2
(E) 8.3
30. If the two periods of the periodic function f are shown in the figure above, what is f (186)?
If t<3x, then 0<y<4
49. If the above statement is true and y=5, which of the following statements must be true ?
50. A laser operation is aiming a laser at the center of a circular disk in space. The disk has a radius of 50 feet and is situated 225 miles directly above the surface of the Earth where the laser is located. If the operator makes a 0.05o error in aiming the laser, by how many feet will the laser beam miss the edge of the disk?
(5,280 feet = 1 mile)
(A) 937
(B) 387
(C) 1,012
(D) 1,037
(E) The laser beam will not miss the disk.
(A) {1}
(B) {3}
(C) {1,2}
(D) {3,4}
(E) {1,2,3}
How to solve these kinds?
Q35. The graph of f shown above. If f (x) = , for which of the following values of x in [ –10, 10] could g(x) = 0?
(A) – 10
(B) 0
(C) 2
(D) 3
(E) 5
Q22. In the xy-plane, the point (0,0) is on the graph of y= f (x). Which of the following points must be on the graph of y = f (x – 2) + 3 ?
(A) (2, –3)
(B) (2, 2)
(C) (2, 3)
(D) ( – 2, –3)
(E) (– 2, 3)
Q. Find the period of :
Q. Let f(x+p) = 1+(2-3f(x)+3(f(x) where p>0, prove that f(x) is periodic.
Q. Let f(x) be a function such that ; f(x-1)+f(x+1) = f(x) , . If f(5)= 100, find