Sorry just really love this song ^w^ My last made me feel like I would never try again
But when I saw you, I felt something I never felt
Come closer, I'll give you all my love
If you treat me right, baby, I'll give you everything
My last made me feel like I would never try again
But when I saw you, I felt something I never felt
Come closer, I'll give you all my love
If you treat me right, baby, I'll give you everything
Talk to me, I need to hear you need me like I need ya
Fall for me, I wanna know you feel how I feel for you, love
Before you, baby, I was numb, drowned out pain by pouring up
Speeding fast on the run, never want to get caught up
Now you the one that I'm calling
Swore that I'd never fall again, don't think I'm just talking
I think I might go all in, no exceptions, girl, I need ya
Think I'm out of my mind, 'cause I can't get enough
Only one that I give my time, 'cause I got eyes for ya
Might make an exception for ya, 'cause I been feeling ya
Think I might be out of my mind, I think that you're the one
My last made me feel like I would never try again
But when I saw you, I felt something I never felt
Come closer, I'll give you all my love
If you treat me right, baby, I'll give you everything
My last made me feel like I would never try again
But when I saw you, I felt something I never felt
Come closer, I'll give you all my love
If you treat me right, baby, I'll give you everything
I'll never give my all again
'Cause I'm sick of falling down
When I open up and give my trust
They find a way to break it down
Tear me up inside, and you break me down

Answer:     the interval on which the curve is concave up is  (-∞, -1/2)======    we find the interval where this curve is concave up by finding the interval in which the 2nd derivative is positive.differentiate the curve equation with respect to x    let the function f denote be the anti-derivative of the inside expression, i.e. a function such that .then use the fundamental theorem of calculus:     differentiate again to get second derivative. we can use chain rule with 1/x as the outside function and 1 + x + x² as the inside function    find critical numbers of the second derivative. these numbers are where the 2nd deriv. is undefined or zero.where the 2nd derivative is zero: set (d²y/dx²) to equal 0 and solve for x    where the 2nd derivative is undefined: if the denominator is equal to zero, the derivative will be undefeined. attempting to solve the equation    1 + x + x² = 0results in a discriminant of      meaning that the equal 1 + x + x² = 0 has no real solutions and therefore will never equal zero.======our only critical number is x = -1/2.this forms two intervals to test the sign for: (-∞, -1/2) and (-1/2, ∞)test values into the 2nd derivative for (-∞, -1/2)if we try x = -1, we get      so the since the 2nd derivative of the curve is positive on the interval  (-∞, -1/2), the curve is concave up on (-∞, -1/2)test values into the 2nd derivative for (-1/2, ∞)if we try x = 0, we get      so the since the 2nd derivative of the curve is positive on the interval  (-∞, -1/2), the  curve is concave down on (-∞, -1/2).the interval on which the curve is concave up is  (-∞, -1/2)