if a straight line ax+ by+cz=0 always passes through (1,-2)then a,b,c are in ?
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Answered by
1
Answer:
If a,b,c are in A.P then
a + c = 2 b
=> a − 2 b + c = 0
=> ax + by + c = 0
it passes through (1, − 2)
pallu45:
thq
and can you xplain A.p,h.p.G.p
Answered by
1
Answer:
Step-by-step explanation:
If ax + by + c = 0 always passes through (1 , - 2) then a - 2b + c = 0, then b - a = c - b which means that a, b and c are in arithmetic progression.
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