Question

# How many real solution does the equation x?+ 14x5 +16x3 + 30x-560 = 0 have? [A (A) 1 (B)3 (C) 5 (D)7

Solution

f(n) = +14 % +1Gn't sou-5600
f'(n) = 70 + 70 nt + 48 n +30 70
It is strictly increasing
functim
when n o ; I(M) - a
nosno; of m) -
it cuts & anis at enactly
one point
It has only one real root
one