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AveGali [126]
3 years ago
9

Find the sum of the G.P,1+2+3+...+45

Mathematics
2 answers:
Colt1911 [192]3 years ago
8 0

Answer:

hello :

note : 1+2+3+.......+n = n(n+1)/2

Step-by-step explanation:

in this exercice : n = 45

1+2+3+...+45 = 45×46/2 = 1035


tankabanditka [31]3 years ago
6 0

Answer:   1035

<u>Step-by-step explanation:</u>

<u>\sum^{45}_{1}i\\\\\text{The sum of an arithmetic sequence is:}\ \dfrac{a_1+a_n}{2}\cdot n\\\\= \dfrac{1+45}{2}\cdot 45\\\\\\=\dfrac{46}{2}\cdot 45\\\\\\=23\cdot 45\\\\=1035</u>

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Y-(-7)=-2/3(x-1)

Y+7=-2/3(x-1)


2. What is the equation of a line, in point-slope form, that passes through (-2,-6) and had a slope of 1/3?


Y-(-6)=1/3(x-(-2))


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6 0
4 years ago
Alexander measures a stack of textbooks to be 38.2 cm tall. If there are 10 textbooks in the stack, how tall is each textbook?
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3.82 cm tall.

Step-by-step explanation:

Alexander measures a stack of textbooks to be 38.2 cm tall. If there are 10 textbooks in the stack, how tall is each textbook?

From the above question:

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3 years ago
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Step-by-step explanation:

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vodomira [7]

Answer:

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