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3 years ago

The nth term of a sequence is n^2 -n-2 .find the sum of the first and third terms

Mathematics

1 answer:

Troyanec [42]3 years ago

8 0

Answer:

Step-by-step explanation:

substitute n=1 and n=3 in the given equation

1 st term is (1)^2-1-2 = 1 -1 -2 = -2

3rd term is (3)^2-3-2 = 9-3-2=4

sum of 1st and 3rd term is -2 + 4 = 2

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Can someone please give me the (Answers) to this? ... please ...

Tpy6a [65]

Answer:

If this is correct, can you mark me as Brainliest Please :)

Step-by-step explanation:

Alternate Interior Angles : 2,7 3,6
Corresponding Angles : (7,5)(6,8)(3,1)(2’d)
Same- Side interior Angles:(6,7) (2,3)
Alternate Exterior Angles : (1,8) (5’d)
Adjacent Angles : (3,7) (7,8)
Supplementary Angles:(1,2) (5,6)

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3 years ago

Fifty five miles per hour converted to feet per second

stiks02 [169]

$\frac{55miles}{hour}*\frac{hour}{3600 seconds}*\frac{5280feet}{mile}$
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3 years ago

Find the derivative g(x)=ln(2x^2+1)

lana [24]

Answer:

4x / (2x^2+1)

Step-by-step explanation:

g(x)=ln(2x^2+1)

Using u substitution

u= 2x^2 +1

du = 4x dx

g'(x) = d/du ( g(u) du)

We know that the derivative of ln(u) = 1/u since this is always positive

= 1/ u* du

Substituting x back into the equation

g'(x) = 1/(2x^2+1) * 4x

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3 years ago

Luna works 60 hours every 3 weeks. At the rate, how many hours will she work in 12 weeks

max2010maxim [7]

60/12= 5 hours per week

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3 years ago

Isaiah put a kilogram on a balance pan. how many 100 gram weights does he need too balance the scale

Leno4ka [110]

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3 years ago