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Standard XI
Mathematics
NCERT
Question
Express the given complex number in the form
a
+
i
b
:
3
(
7
+
7
i
)
+
i
(
7
+
i
7
)
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Solution
Verified by Toppr
Given,
3
(
7
+
7
i
)
+
i
(
7
+
i
7
)
=
21
+
21
i
+
7
i
+
7
i
2
=
21
+
28
i
+
7
×
(
−
1
)
,
[
∵
i
2
=
−
1
]
=
14
+
28
i
=
a
+
i
b
,
where
a
=
14
,
b
=
28
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2
Similar Questions
Q1
Express the given complex number in the form
a
+
i
b
:
3
(
7
+
7
i
)
+
i
(
7
+
i
7
)
View Solution
Q2
Express the given complex number
3
(
7
+
i
7
)
+
i
(
7
+
i
7
)
in the form
a
+
i
b
,
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Q3
Express the complex numbers in the form of a + ib:
3
(
7
+
i
7
)
+
i
(
7
+
i
7
)
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Q4
Express the given complex number in the form
a
+
i
b
:
[
(
1
3
+
i
7
3
)
+
(
4
+
i
1
3
)
]
−
(
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3
+
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Q5
Evaluate:
3
(
7
+
i
7
)
+
i
(
7
+
i
7
)
View Solution