Question

4. Assertion (A): If f(x) is a quadratic
3) P =
4) p = -2 or 0
1
expression such that f (1)+ f(2)=0, if-1 is
2
a root of f (x)=0 then the other root is
8
5
3
Reason (R): If f(x) = ax^2 +bx+c then
4
b
a + B =
b
,aß = 9
a
a
1
1) Both A and R are true and R is the correct
explanation ofA.
2) Both A and R are true and R is not the correct
explanation of
A.
3) A is true but R is false
4) A is false but R is true
1
If one root of x² + px +12=0 is 4 while​

Answer 1

Answer:

given:

p= ₹ 2500

a=₹3025

t=2years

to find : rate% p.a.

solution:

a= p(1+r/100)to the power t

3025=2500(1+r/100) to the power 2

3025/2500=(1+r/100) to the power 2

121/100= (1+r/100) to the power 2

(121 is the square of 11 & 100 is the square of 10 so the power of 2 on both sides will be cancelled)

11/10=1+r/100

11/10-1= r/100

1/10= r/100

r= 1×100/10

r=10%

Step-by-step explanation: