joshua1255
06.10.2019 •
Mathematics
Find the sum of the sequence 37+38+39+40+
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Ответ:
Ответ:
First, you have to calculate the number in the sequence
an = a+(n-1)d
130 = 27+(n-1)1
130-27 = n-1
103+1 = n
n = 104
Now, calculating for sum (Sn)
Sn = n/2 (a+an) = 104/2 (37+130) = 52 (167) = 8684
Ответ:
5y=4
y=4/5
substitute back to 1st n 2nd eqn n solve for x n z
-4x-4-z=18 and -2x-4-2z=12
simplify -4x-z=22 and -2x-2z=16
-4x-(-x-8)=22
-3x+8=22
x=-14/3
z=-10/3
y=4/5