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nasty-shy [4]
3 years ago
15

Find the sum of nth term of the series 1+3/2+5/2^2+7/2^3+.......

Mathematics
1 answer:
ioda3 years ago
6 0

Answer:

an = (1 + 2·(n - 1))/2^(n - 1) = 2^(1 - n)·(2·n - 1)

sn = 6 - 2·0.5^n·(2·n + 3)


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2+2= what smart ppl ....
tangare [24]

Answer:

It equals 420.

Step-by-step explanation:

6 0
3 years ago
Show step by step......​
tankabanditka [31]

Answer:

Step-by-step explanation:

Amount paid for first 100 watches = (65% of 80) *100

                                                        =\frac{65}{100}*80*100\\\\= 65*80\\= 5200

Amount paid for next 50 watches = (55% of 80) * 50

                                                        = \frac{55}{100}*80*50\\\\= 55 * 8 * 5\\\\= 2200

Remaining watches = 280 -(100+ 55)

                                 = 280 - 155 = 125

Amount paid for 125 watches = (45% of 80) *125

                                                  = \frac{45}{100}*80*125\\\\= 45 * 20 * 5\\\\= 4500

Amount received by the watch maker = 5200 + 2200 + 4500

                                                               = £ 11900

3 0
3 years ago
If z = 2, find the value of: a. 6z2–2z+5<br> b. 64–5z
Ludmilka [50]

Answer:

25 and 54

Step-by-step explanation:

(a)

6z² - 2z + 5 ← substitute z = 2

= 6(2)² - 2(2) + 5

= 6(4) - 4 + 5

= 24 - 4 + 5

= 20 + 5

= 25

(b)

64 - 5z ← substitute z = 2

= 64 - 5(2)

= 64 - 10

= 54

4 0
2 years ago
If m XAB=32, what is m BAC?
dalvyx [7]
The picture in the attached figure

we know that
<span>The construction shown is an angle bisector
m<XAB=m<CAX
</span>so
m<BAC=2*[m<XAB]-----> 2*32°----->m<BAC= 64°

the answer is
m<BAC=64°

3 0
3 years ago
The area of a parallelogram is a equals BH where B is the base and H is the height of the parallelogram what is the area of a pa
trasher [3.6K]
The area of a parallelogram is 100 cm
5 0
3 years ago
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