How many terms of the arithmetic sequence {-4,-2, 0, ....} will give a sum of 500?
1 answer:
Answer:
a. 25
Step-by-step explanation:
Sₙ = n/2 * (2 * a₁ + (n-1) * d)
Sₙ = 500 a₁ = -4 d = 2
500 = n/2 * (-8 + (n-1) * 2) = n/2 * (-8 + 2n - 2) = n/2 * (2n - 10) = n² -5n
n² - 5n -500 = 0
(n - 25) (n + 20) = 0
n > 0
n = 25
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13 + 2x = 3
subtract 13 from both sides of the equation
2x = -10
divide by 2 on both sides
x = -5
Every rational expression can be written in infinitely many equvialent forms which is 3/3n-15/2.
Answer:
2/15/76
Step-by-step explanation:
I don't want to disappoint you but that's my answer thank me later and good luck
