Question

I want solution of this question ----


Correct options are B and D (Tell me the solution of this question Please)

Answer 1

STEP BY ANSWER:

Answer is (B), (D)

It is given that

98 k+1 =Σ] 1= k=1 k k+1 -dx x(x+1)

98 k+1 98 k+1 = 2 (k+1} ] *x(x + 1dx = 2 (k+1) ] ( = = x+)* 1 x(x+1) dx k=1 k k=1 X

98 = (x + 1) [Inx-In(x+1)+¹]

k=1

98 = 2 (k = Σ(k+1)[(In(k+1)-Ink) — (In(k+1+1)-In(k+1)]

k=1

98 = Σ(k+ 1){in(k+1)-Ink-in(k+2)+ln(k+1 -1}]

k=1

98

=Σ(k+1)In(k+1)-(k+1)Ink-(k+1)In(k

k=1

+2)+(k+1)In(k+1)

98 Σ(k+1)In(k+1)-klnk-Ink-(k+1)In(k k=1

+2)+kIn(k+1)+In(k+1)

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Answer 2

Step-by-step explanation:

The last step of the above solution is,

I > 98/100

=> I > 49/50

Hence answer is D