Class : Class 10
'a' is positive as the parabola is opened upwards and 'c' is negative as it cut negative(-ve) X-Axis. Not sure about 'b'.
Class : Class 10
a is positive as the parabola opens upward, c is negative as it cuts negative y axis at p and b is negative
Class : Class 10
b is negative because -b/2a is minimum value of x for which equation satisfies which is veSo, -(-ve)/2( ve) is positive so b need to be negative
Class : Class 10
b is negative because -b/2a is minimum value of x for which equation satisfies which is veSo, -(-ve)/2( ve) is positive so b need to be negative
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Ans 5:
Class : Class 10
Sebaceous glands. The secretions from this gland increases during puberty, causing pimples and acne.