Answer:
(-5,-1,1)
Step-by-step explanation:
You must substitute for <em>x</em>.
Answer:
answer: b) x = 3, x = -1
Step-by-step explanation:
3|2x - 2| + 6 = 18.
divid by 3 :
|2x - 2| + 2 = 6
add -2 : |2x - 2| = 4
2x-2=4 or 2x-2=-4
2x=6 or 2x=-2
x=3 or x=-1
Answer:
= 3.5 x 10^ -12
Step-by-step explanation:
i hope this helps :)
Triangular sequence = n(n + 1)/2
If 630 is a triangular number, then:
n(n + 1)/2 = 630
Then n should be a positive whole number if 630 is a triangular number.
n(n + 1)/2 = 630
n(n + 1) = 2*630
n(n + 1) = 1260
n² + n = 1260
n² + n - 1260 = 0
By trial an error note that 1260 = 35 * 36
n² + n - 1260 = 0
Replace n with 36n - 35n
n² + 36n - 35n - 1260 = 0
n(n + 36) - 35(n + 36) = 0
(n + 36)(n - 35) = 0
n + 36 = 0 or n - 35 = 0
n = 0 - 36, or n = 0 + 35
n = -36, or 35
n can not be negative.
n = 35 is valid.
Since n is a positive whole number, that means 630 is a triangular number.
So the answer is True.
25 is the number. Hope this helps.
