Question

the value of the product (3+ 5/x) (9- 15/x + 25/x2) at x = 1 the answer is:-
a)125
b)152
c)135
d)none

Answer 1

Answer:

152

Step-by-step explanation:

at x =1

(3 + 5)(9 -15 + 25)

=(8)(19)=152

Answer 2

Answer:

Option b

Step-by-step explanation:

Given :-

(3+ 5/x) (9- 15/x + 25/x²)

To find :-

Find the value of the product at x = 1 ?

Solution :-

Method-1:-

Given that

(3+ 5/x) (9- 15/x + 25/x²)

Put x = 1 then

=> [3+(5/1)][9-(15/1)+(25/1²)]

=> [3+5][9-15+25]

=> 8(34-15)

=> 8(19)

=> 152

Method-2:-

Given that

(3+ 5/x) (9- 15/x + 25/x²)

=> [(3x+5)/x][(9x²-15x+25)/x²]

=> [(3x+5)(9x²-15x+25)]/x³

Now,

Put x = 1 then

=> [(3(1)+5))(9(1)²-15(1)+25)]/1³

=> (3+5)(9-15+25)/1

=> 8(19)

=> 152

Answer:-

The value of the given product at x = 1 is 152