If a and b are order and degree of differential equation y'' + (y')2 + 2y = 0, then value of 2a + 6b, is :
Answer & explanation
Correct answer: option 4
y'' + (y')2 + 2y = 0
highest order derivative ⇒ order = 2 = a
max. power of it ⇒ degree = 1 = b
so 2a + 6b
= 2 × 2 + 6 × 1
= 4 + 6
= 10