1.

The graphs of yand c.ase bx + care given in fi, uire. Identify the signs of a, b-b D2a,4ax'

Answer»

As it opening downward a is less than zeroso a is having negative signso as the curve is touching the x axis in the first quadrentas in first quadrent both x and y are of positive signso b and c will be of of positive sign

also, thexco-ordinate i.e.(−b/2a)of the vertex is in first quadrant, which meansxis positive, so the sign ofbis positive

andy=cand at x=0 and y is positive, so the sign ofcis positive

do u think x and y are in first quadrant

As it's touching it we can see

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