Find the equation of the tangent line of the function f(x) =√2x+7​ at x=1 and use it to approximate √8.98​.
a) y=1.5x+3.5, √8.98​≈4.487
b) y=1.5x+3, √8.98​≈4.475
c) y=1.5x+3.5,√8.98​≈4.475
d) y=1.5x+3, 8.√98​≈4.487