Question
B. In the expansion of
, what is the:
i.
term
ii. coefficient of the
term
iii. third term in ascending powers of
i.
ii. coefficient of the
iii. third term in ascending powers of
Ask by Munoz Carter. in Jamaica
Mar 20,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
The
term in the expansion of
is
. The coefficient of the
term is
, and the third term in ascending powers of
is
.
Solution
To find the
term in the expansion of
, we can use the binomial theorem. The binomial theorem states that for any positive integer
, the expansion of
is given by:
In this case,
and
. The
term in the expansion corresponds to the term where
, since the terms are indexed from 0.
Therefore, the
term in the expansion of
is:
Now, let’s calculate the coefficient of the
term in the expansion of
. The coefficient of the
term corresponds to the term where
.
The coefficient of the
term is given by:
Finally, to find the third term in ascending powers of
, we need to find the term where
.
The third term in ascending powers of
is given by:
Let’s calculate these values.
Simplify the expression by following steps:
Simplify the expression by following steps:
- step0: Solution:
- step1: Multiply the terms:
- step2: Multiply the terms:
- step3: Multiply the numbers:
- step4: Multiply the terms:
- step5: Multiply the numbers:
Calculate or simplify the expression.
Simplify the expression by following steps: - step0: Solution:
- step1: Multiply the terms:
- step2: Multiply the terms:
- step3: Multiply the numbers:
- step4: Multiply the terms:
- step5: Multiply the numbers:
Calculate or simplify the expression.
Simplify the expression by following steps: - step0: Solution:
- step1: Multiply the terms:
- step2: Multiply the terms:
- step3: Multiply the numbers:
- step4: Multiply the terms:
- step5: Multiply the numbers:
Theterm in the expansion of is .
The coefficient of the
term in the expansion of
is
.
The third term in ascending powers of
is
.
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Extra Insights
To tackle the problem, let’s employ the Binomial Theorem, which states that:
For
, we can identify
,
, and
.
Part i: The
term
The
term in the expansion means that we are looking for a term where
because
raised to the power 6 will be
, and
raised to the power
gives us
.
The term corresponding to
is:
Calculating this:
So, the
term is:
Part ii: Coefficient of the
term
The
term implies we are looking for the term where
appears, which corresponds to
since the exponent of
will be
.
Thus, we already calculated the
term:
The coefficient can be calculated as follows:
This equals:
Part iii: The third term in ascending powers of
The third term corresponds to
because we start counting from
.
Calculating the third term yields:
Calculating step-by-step:
Thus, the third term is:
In summary:
- The
term is . - The coefficient of the
term is . - The third term in ascending powers of
is .