Question

2. The value of p-q+pq for p= -1.9 = -2 is (a) (b)-1 (c)-5 (d) 3​

Answer 1

Answer:

2

Explanation: (A) 19/10 = 1.9

(B) 1999/1000= 1.999

(C) 2

(D) 1/9= 0.111….

Let x = 1.9999….. — ( 1 )

Multiply equation ( 1 ) with 10

10x = 19.9999….. — ( 2 )

Subtract equation (1) from equaion(2)

We get,

9x = 18

x = 18 / 9

x = 2

Therefore, x = 1.9999… = 2

Hence, 2 is the correct answer.