Question

The number of real solutions of the equation sin x = x2 + x + 1 is​

Answer 1

Answer:

Step-by-step explanation:

REF.Image

Sol. sinx=x  

2

+x+1

Let y=sinx

We would should this sum graphically

y=x^2 +x+1

The function is a quadratic so the graph is parabola which either opens upward and downwards.

now put x=0

x=1

x=−1

now sketch the graph so there are 3 point on the graph, ∴ ans = 3.