Question

if the value of (a^3-b^3/a^3+b^3) when a=7 and b =2 is 335/p, then p is 321​

Answer 1

Answer:

The correct option is B False

a

3

−

b

3

=

(

a

−

b

)

(

a

2

+

a

b

+

b

2

)

a

3

+

b

3

=

(

a

+

b

)

(

a

2

−

a

b

+

b

2

)

Putting the values of

a

and

b

, we get the value of

p

as

351

.

Alternatively, we can observe that since

a

and

b

are positive, so the denominator has to be greater than the numerator. Thus,

a

3

+

b

3

will be greater than

a

3

−

b

3

.