Use the formula \displaystyle S_n=a_1\cdot \frac{1-r^{n}}{1-r}S
n

=a
1

⋅
1−r
1−r
n

to evaluate the following sum.
\displaystyle \sum_{k=1}^{7}\left(-10 \left(3\right)^{k}\right)
k=1
∑
7

(−10(3)
k
)

Question

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Today at 4:25 PM
Mathematics

Answered

Use the formula \displaystyle S_n=a_1\cdot \frac{1-r^{n}}{1-r}S
n

=a
1

⋅
1−r
1−r
n

to evaluate the following sum.
\displaystyle \sum_{k=1}^{7}\left(-10 \left(3\right)^{k}\right)
k=1
∑
7

(−10(3)
k
)

$Use the formula \displaystyle Sn=a1\cdot \frac{1-r^{n}}{1-r}S n =a 1 ⋅ 1−r 1−r n to evaluate the following sum. \displaystyle \sum{k=1}^{7}\left(-10 \le class=$

Answer :

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Use the formula \displaystyle S_n=a_1\cdot \frac{1-r^{n}}{1-r}S n ​ =a 1 ​ ⋅ 1−r 1−r n ​ ​ to evaluate the following sum. \displaystyle \sum_{k=1}^{7}\left(-10 \left(3\right)^{k}\right) k=1 ∑ 7 ​ (−10(3) k )

Answer :

Other Questions

Use the formula \displaystyle S_n=a_1\cdot \frac{1-r^{n}}{1-r}S
n

=a
1

⋅
1−r
1−r
n

to evaluate the following sum.
\displaystyle \sum_{k=1}^{7}\left(-10 \left(3\right)^{k}\right)
k=1
∑
7

(−10(3)
k
)