Write the series using summation notation: -1 +4-9+ 16 - 25+ ...

Find the nonpermissible replacement for binthis expression.b2/5b +5

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two