Answer:
The sum of 12 terms of AP = -318
Step-by-step explanation:
Points to remember
Sum of n terms of an AP
Sₙ = n/2[ 2a + (n - 1)d]
Where n - number of terms
a - first term
d - common difference
<u>To find the sum of 12 terms</u>
The given AP is 1, -4, -9, -14, . . .
a = 1, d= -5 and n = 12
Sₙ = n/2[ 2a + (n - 1)d]
= 12/2[2*1 + (12 - 1)*(-5)]
= 6[2 + (11*(-5))]
= 6[2 - 55]
= 6 * (-53)
= -318
The sum of 12 terms of AP = -318
Answer:
REFLECTION ROTATION
Step-by-step explanation:
similar
If an average person in the United States throws away 4.5 × 10² g of trash per day and the number of persons is <span>3.2×10^6, then the mass of trash thrown away in United States would be 1.44 x 10^9 grams. This is obtained by multiplying the mass of trash thrown by one person to the number of persons in the U.S.</span>
Find the vertex by using the formula -b/2a
To find a and b, we must know that a and b are located at y = ax^2 + bx + c.
We find that b is 4 and a is 1 by looking at the given quadratic function.
The answer is A. -4/2(1) because the question is looking for the correct steps to find the answer.
Informative. Funny. Cool. Excellent.
