3 years ago

Question

Mathematics

1 answer:

quester [9]3 years ago

4 0

Answer:

Step-by-step explanation:

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What are the first and last terms of this geometric series

11Alexandr11 [23.1K]

ANSWER

E. 10 and 640

EXPLANATION

The given series is

$\sum_{i=1}^45 \times 2^{2i-1}$

To find the first term of the series we substitute i=1 to get,

$a_1 = 5 \times {2}^{2 \times 1 - 1}$

$a_1 = 5 \times {2}^{ 1} = 10$

For the last term of the series, we substitute i=4 to obtain,

$a_4 = 5 \times {2}^{2 \times 4 - 1}$

$a_4 = 5 \times {2}^{7}$

This implies that,

$a_4 = 5 \times 128 = 640$

Therefore the correct answer is E

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3 years ago

Solve for x.<br> x2 + 8x + 15 = 0

likoan [24]

Answer: x=−3 or x=−5

Step-by-step explanation:

Step 1: Factor left side of equation.

(x+3)(x+5)=0

Step 2: Set factors equal to 0.

x+3=0 or x+5=0

x=−3 or x=−5

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3 years ago

Solve, leaving in terms of a logarithm, with steps please! 160(0.4^x) +1=321

ludmilkaskok [199]

Answer:

321

Step-by-step explanation:

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3 years ago

I'm confused! Given: f(x) = x 2 + 2x + 1, find f(x + h) and simplify. is that the derivative formula? what should I do?

ZanzabumX [31]

<span>x 2 + 2x + 1 if you wanted is just 4x+1

</span>

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3 years ago

2.) Solve 48 = -6<br>4.) Solve 4 + 3.5 = 12.5

3241004551 [841]

These aren't solvable.

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3 years ago