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damaskus [11]
3 years ago
12

Find the distance between a horizontal line at y = −3 and a point (–1,−5). answers: 5 units 4 units 2 units 1 units

Mathematics
1 answer:
eduard3 years ago
3 0

Answer:

2 UNITS

Step-by-step explanation:

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"Find the sum of the first 50 term in this sequence 4, 7, 10, 13, ...". How do i do this without writing them all out, and how d
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First term ,a=4 , common difference =4-7=-3, n =50
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derivation of the formula for the sum of n terms
Progression, S
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S=an+an−1+an−2+an−3+...+a1

S=an+(an−d)+(an−2d)+(an−3d)+...+[an−(n−1)d]   →   Equation (2)

Add Equations (1) and (2)
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2S=n(a1+an)
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S=n/2{a1+[a1+(n−1)d]}
S=n/2[2a1+(n−1)d]
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OR
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natka813 [3]
You tell me buddy :)
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