If a is such that dx £ a + 4, then – | MATH - FUNDAMENTAL DEFINITE INTEGRATION, DEFINITE INTEGRATION BY SUBSTITUTION | SolveeIt | Solveeit

Today, August 18

Question

If a is such that dx £ a + 4, then –

A

– 2 £ a £ 0

B

– 2 £ a £ 4

C

0 £ a £ 4

D

a £ – 2 or a ³ 4

Answer

– 2 £ a £ 4

Explanation

Solution

$\frac { \mathrm { a } ^ { 2 } } { 2 }$ £ a +2 ̃ a² – 2a – 8 £ 8

̃ (a – 4) (a + 2) £ 0 ̃ – 2 £ a £ 4