(C) N:N.
(D)
•N::N.
3
The sky as seen from the surface of the moon appears dark because,
(A)
only a little of the blue and violet colours are scattered
(B)
all the colours are absorbed by the atmosphere present in the moon
(C)
all the colours are scattered
(D) atmospheric particles needed to scatter the light are not present.
RR (A)-1124 *
Answers
Answered by
0
Answer:
Note that the first and last terms are perfect cubes and find:
27
x
3
+
54
x
2
+
36
x
+
8
=
(
3
x
+
2
)
3
Explanation:
Notice that the ratio between the first and second coefficients is not the same as that between the third and fourth.
That is:
27
54
≠
36
8
So this does not factor by grouping.
Note that the first and last terms are both perfect cubes:
27
x
3
=
(
3
x
)
3
8
=
2
3
So we might try
(
3
x
+
2
)
3
:
(
3
x
+
2
)
3
=
27
x
3
+
54
x
2
+
36
x
+
8
Yes - that's our factoring.
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