- #1
pakmingki
- 93
- 1
for example, i want to find the coeffiecients of a function f(x) = ax^2 + bx + c for these given conditions:
f(-1) = 3
f(1) = 3
i tried plugging and chugging
for the first condition:
3 = a - b + c
3 = a + b + c
now i tried subtracting the system to get
0 = 2b
so its solved that b = 0
so now we got a step further towards the goal, and we know we can right the function as
f(x) = ax^2 + c
so now we try plugging and chugging again, but then we get
3 = a + c
3 = a + c
since they are the same equation, i don't know how we can solve for a and c.
f(-1) = 3
f(1) = 3
i tried plugging and chugging
for the first condition:
3 = a - b + c
3 = a + b + c
now i tried subtracting the system to get
0 = 2b
so its solved that b = 0
so now we got a step further towards the goal, and we know we can right the function as
f(x) = ax^2 + c
so now we try plugging and chugging again, but then we get
3 = a + c
3 = a + c
since they are the same equation, i don't know how we can solve for a and c.